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Pipe elbow STL 3D file 90° ⌀OD: 28 mm ⌀ID: 26 mm thickness: 1 mm 📦 #1403

1 object(s) - format STL

gizmo

Latest model generated online:

Rectangular pipe adapter STL 3D file 100x30 mm to 80x20 mm – transition: 20 mm 📦 #3936

1 object(s) - format STL

gizmo

From the blog

Modify 3D geometry in the slicer

2025-11-14 · 3D Modeling · sylvain
modify 3D geometry in the slicer modify 3D geometry in the slicer

Editing 3D geometry without CAD software is absolutely possible!

In this article, you’ll learn how to tweak your models directly in your slicer. It’s the perfect approach when the generated model is almost right but still needs a small adjustment.

You’ll see how to rescale a part, work axis by axis, and even compensate for a missing step size in the template, with concrete examples like the honeycomb grid and snap-on pipe clip holders.

We’ll also look at the slicer’s advanced editing tools: adding volumes, subtracting geometry, embossed or debossed text, and custom holes — all simple operations that let you adapt an existing STL with zero CAD skills.

A practical, quick, and handy guide to personalize your prints in just a few clicks!

Read the article

A selection of custom 3D models

📦 Model #3687

2 object(s)
- format STL
Enclosure with screw-mounted lid STL 3D file: 50×50×35 mm
Enclosure with screw-mounted lid STL 3D file: 50×50×35 mm
View of object #0
Enclosure model with a screwed lid in 3D STL format. The dimensions are 50 mm long by 50 mm wide and 35 mm high. The lid is 10 mm high. Wall thickness is 3 mm. The enclosure does not feature cooling.
Parameter Value Unit
length 50 mm
width 50 mm
total height 35 mm
lid height 10 mm
wall thickness 3 mm
screw margin 0 mm
fit clearance 0.1 mm
cooling zone(s) no cutouts

📦 Model #993

1 object(s)
- format STL
U-shaped handle STL 3D file 50×140×14 mm (Center-to-center 126 mm)
U-shaped handle STL 3D file 50×140×14 mm (Center-to-center 126 mm)
Download this STL 3D model of a simple U-shaped furniture handle. The overall dimensions are 50×140×14 mm. The handle has a circular cross-section combined with a softened transition. The holes are 6 mm diameter with a center-to-center distance of 126 mm.
Parameter Value Unit
width 50 mm
length 140 mm
thickness 14 mm
shape (0:square,1:circle) 1
transition (0:right,1:rounded) 1
fillet radius 0 mm
hole diameter 6 mm

📦 Model #1141

2 object(s)
- format STL
Enclosure with screw-mounted lid STL file: 76×46×25 mm (with ventilation on the lid)
Enclosure with screw-mounted lid STL file: 76×46×25 mm (with ventilation on the lid)
View of object #0
Enclosure with a screwed lid in STL format. The dimensions are 76 mm long by 46 mm wide and 25 mm high. The cover is 15 mm high. Side thickness is 3 mm. This enclosure has significant cooling area on the lid.
Parameter Value Unit
length 76 mm
width 46 mm
total height 25 mm
lid height 15 mm
wall thickness 3 mm
screw margin 0 mm
fit clearance 0.1 mm
cooling level 6
cooling zone(s) cutouts on t...

📦 Model #873

1 object(s)
- format STL
U-shaped handle STL file 35×140×14 mm (Center-to-center 126 mm)
U-shaped handle STL file 35×140×14 mm (Center-to-center 126 mm)
Download this STL 3D model of a simple U-shaped drawer handle. The overall dimensions are 35×140×14 mm. This handle has a square profile combined with a straight transition. A fillet along the edges produces a softer grip. The holes are 6 mm diameter with a center-to-center distance of 126 mm.
Parameter Value Unit
width 35 mm
length 140 mm
thickness 14 mm
shape (0:square,1:circle) 0
transition (0:right,1:rounded) 0
fillet radius 1 mm
hole diameter 6 mm

📦 Model #3577

1 object(s)
- format STL
Protective grid STL 3D file, 296x116mm, mesh: 5mm
Protective grid STL 3D file, 296x116mm, mesh: 5mm
Download this 3D rectangular protective honeycomb grid as a STL file. The overall size is 296x116 mm, with medium 5 mm cell size for balanced airflow and protection. This type of grid serves both protection and ventilation roles.
Parameter Value Unit
length or center-to-center 296 mm
width or center-to-center 116 mm
mesh size 5 mm
dual color no
holes no

📦 Model #1993

1 object(s)
- format STL
Round air vent STL file ∅ 123 mm, slat angle: 45° with central reinforcement
Round air vent STL file ∅ 123 mm, slat angle: 45° with central reinforcement
3D model of a round vent cover for air circulation in STL format. Its male diameter is 123 mm. The slats have an angle of 45° and a high thickness of 2 mm. A central reinforcement reinforces the slats. This aeration grille has a prominent flange of 20 mm. The total diameter of the model is 163 mm.
Parameter Value Unit
male diameter 123 mm
slat angle 45 °
slat thickness 2 mm
flange width 20 mm
central reinforcement yes

📦 Model #975

1 object(s)
- format STL
U-shaped handle STL 3D file 50×140×10 mm (Center-to-center 130 mm)
U-shaped handle STL 3D file 50×140×10 mm (Center-to-center 130 mm)
Download this STL model of a U-shaped drawer handle. The overall dimensions are 50×140×10 mm. The handle features a round cross-section combined with a rounded transition. The bores are 6 mm diameter with a center-to-center distance of 130 mm.
Parameter Value Unit
width 50 mm
length 140 mm
thickness 10 mm
shape (0:square,1:circle) 1
transition (0:right,1:rounded) 1
fillet radius 0 mm
hole diameter 6 mm

📦 Model #2065

1 object(s)
- format STL
Multi-compartment box STL file: 48 compartments of 40×30×30 mm
Multi-compartment box STL file: 48 compartments of 40×30×30 mm
This parametric multi-compartment box features 48 storage spaces measuring 40×30×30mm each. The total dimensions are 257.5×262.5×32.5mm. Fillets of 4mm applied to each compartment help with item retrieval stored in slots.
Parameter Value Unit
number of rows 8
number of columns 6
compartment length 40 mm
compartment width 30 mm
compartment height 30 mm
wall thickness 2.5 mm
compartment fillet (radius) 4 mm

📦 Model #3679

1 object(s)
- format STL
Honeycomb grid STL file, center-to-center: 110x60mm, mesh: 3mm - Ø4mm
Honeycomb grid STL file, center-to-center: 110x60mm, mesh: 3mm - Ø4mm
3D rectangular honeycomb grid model as a STL file. Mounting holes are placed at the four corners (center-to-center 110x60 mm), each with a diameter of Ø4 mm. The overall dimensions reach 118x68 mm, with extra fine 3 mm cell size for strong protection. This grid provides both mechanical protection and airflow.
Parameter Value Unit
length or center-to-center 110 mm
width or center-to-center 60 mm
mesh size 3 mm
dual color no
holes yes
hole diameter 4 mm

📦 Model #2300

2 object(s)
- format STL
Small parts organizer with 6 drawers 40×80×50 mm STL 3D file, thickness: 2 mm
Small parts organizer with 6 drawers 40×80×50 mm STL 3D file, thickness: 2 mm
View of object #0
3D file of a DIY organizer in 3D STL format. This model features 6 drawers, arranged in 2 rows and 3 columns. Specifically, this means 2 rows of 3 drawers. Each drawer has usable dimensions of 40 mm wide, 80 mm high, and 50 mm deep. The wall thickness is 2 mm. The total size of the box measure 141.5 x 171 x 56 mm. All the objects in this model are intended to be printable without support.
Parameter Value Unit
number of rows 2
number of columns 3
inner drawer depth 50 mm
inner drawer width 40 mm
inner drawer height 80 mm
wall thickness 2 mm
removable divider none

📦 Model #3588

1 object(s)
- format STL
Honeycomb grid STL file, center-to-center: 250x140mm, mesh: 10mm - Ø5mm
Honeycomb grid STL file, center-to-center: 250x140mm, mesh: 10mm - Ø5mm
3D honeycomb protective rectangular grid file in STL format. Mounting holes are placed at the four corners (center-to-center 250x140 mm), each with a diameter of Ø5 mm. The overall dimensions reach 260x150 mm, with very open 10 mm cell size for peak ventilation. This grid functions as both a mechanical guard and a ventilation panel.
Parameter Value Unit
length or center-to-center 250 mm
width or center-to-center 140 mm
mesh size 10 mm
dual color no
holes yes
hole diameter 5 mm

📦 Model #3559

1 object(s)
- format STL
Tube adapter STL 3D file ⌀ 70–25 mm (Length: 50 mm)
Tube adapter STL 3D file ⌀ 70–25 mm (Length: 50 mm)
Inline tube adapter ⌀70 mm to ⌀25 mm in STL 3D format. Total length of this sleeve is 50 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 8 mm, the smaller one of 20 mm. The ends are not rounded.
Parameter Value Unit
side A length 8 mm
side A outer diameter 70 mm
side A thickness 2 mm
side B length 20 mm
side B outer diameter 25 mm
side B thickness 2 mm
transition length 22 mm
axis offset 0 mm
ends fillet no fillet

📦 Model #2114

1 object(s)
- format STL
Tube adapter STL 3D file ⌀ 103–88 mm (Length: 90 mm)
Tube adapter STL 3D file ⌀ 103–88 mm (Length: 90 mm)
Inline tube junction ⌀103 mm to ⌀88 mm in STL format. Total length of this sleeve is 90 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 30 mm, the smaller one of 50 mm. The ends have a fillet on the outside.
Parameter Value Unit
side A length 30 mm
side A outer diameter 103 mm
side A thickness 2 mm
side B length 50 mm
side B outer diameter 88 mm
side B thickness 2 mm
transition length 10 mm
axis offset 0 mm
ends fillet fillet on th...

📦 Model #1924

1 object(s)
- format STL
Tube adapter STL 3D file ⌀ 16–9 mm (Length: 40 mm)
Tube adapter STL 3D file ⌀ 16–9 mm (Length: 40 mm)
Inline tube junction ⌀16 mm to ⌀9 mm in STL format. Final length of this coupler is 40 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 10 mm, the smaller one of 10 mm as well. The axes of the tubes are offset by 3.1 mm. The ends are not rounded.
Parameter Value Unit
side A length 10 mm
side A outer diameter 16 mm
side A thickness 2 mm
side B length 10 mm
side B outer diameter 9 mm
side B thickness 2 mm
transition length 20 mm
axis offset 3.1 mm
ends fillet no fillet

📦 Model #3576

1 object(s)
- format STL
Protective grid STL file, 75x75mm, mesh: 10mm
Protective grid STL file, 75x75mm, mesh: 10mm
Download this 3D square grid model in STL format. The overall size is 75x75 mm, with very large 10 mm cell size for peak ventilation. This grid functions as both a mechanical guard and a ventilation panel.
Parameter Value Unit
length or center-to-center 75 mm
width or center-to-center 75 mm
mesh size 10 mm
dual color no
holes no

📦 Model #1475

1 object(s)
- format STL
Round-to-Rectangular Tube Adapter STL file ⌀120 mm to 60×40 mm, thickness 3 mm + offset
Round-to-Rectangular Tube Adapter STL file ⌀120 mm to 60×40 mm, thickness 3 mm + offset
File in STL format of a round-to-rectangular adapter with an external diameter of ⌀120 mm and a rectangular section with inner dimensions 60×40 mm. The shell thickness is 3 mm and the overall length is 100 mm. The adapter has an offset of 10 mm along the Y axis and 10 mm along the Z axis. Chamfers are present on the outside of the cylindrical end and on the inside of the rectangular end to ease insertion.
Parameter Value Unit
cylinder outer diameter 120 mm
cylinder inlet length 30 mm
rectangle internal length 60 mm
rectangle internal height 40 mm
rectangle inlet length 30 mm
offset Z 10 mm
offset Y 10 mm
total length 100 mm
thickness 3 mm
chamfer chamfers on ...

📦 Model #1772

1 object(s)
- format STL
Round-to-Rectangular Tube Adapter STL file ⌀80 mm to 105×50 mm, thickness 2 mm
Round-to-Rectangular Tube Adapter STL file ⌀80 mm to 105×50 mm, thickness 2 mm
Download this 3D file in STL format of a round-to-rectangular adapter with an outer diameter of ⌀80 mm and a rectangular section with inner dimensions 105×50 mm. The wall thickness is 2 mm and the total length is 150 mm.
Parameter Value Unit
cylinder outer diameter 80 mm
cylinder inlet length 50 mm
rectangle internal length 105 mm
rectangle internal height 50 mm
rectangle inlet length 50 mm
offset Z 0 mm
offset Y 0 mm
total length 150 mm
thickness 2 mm
chamfer no chamfer

📦 Model #944

1 object(s)
- format STL
U-shaped handle STL 3D file 50×100×20 mm (Center-to-center 80 mm)
U-shaped handle STL 3D file 50×100×20 mm (Center-to-center 80 mm)
Download this 3D model of a simple U-shaped drawer handle. The external dimensions are 50×100×20 mm. This handle features a square section and a right-angled transition. A light fillet produces a softer grip. The holes are 5 mm diameter and have a 80 mm center-to-center distance.
Parameter Value Unit
width 50 mm
length 100 mm
thickness 20 mm
shape (0:square,1:circle) 0
transition (0:right,1:rounded) 0
fillet radius 1 mm
hole diameter 5 mm

📦 Model #3675

1 object(s)
- format STL
Tube adapter STL file ⌀ 27–21 mm (Length: 395 mm)
Tube adapter STL file ⌀ 27–21 mm (Length: 395 mm)
Straight tube coupler ⌀27 mm to ⌀21 mm in STL 3D format. Total length of this sleeve is 395 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 60 mm, the smaller one of 300 mm. The ends have no fillet.
Parameter Value Unit
side A length 60 mm
side A outer diameter 27 mm
side A thickness 2 mm
side B length 300 mm
side B outer diameter 21 mm
side B thickness 2 mm
transition length 35 mm
axis offset 0 mm
ends fillet no fillet

📦 Model #3579

1 object(s)
- format STL
Honeycomb grid STL file, 148x116mm, mesh: 10mm
Honeycomb grid STL file, 148x116mm, mesh: 10mm
Download this 3D rectangular honeycomb grid model in STL format. The overall size is 148x116 mm, with very large 10 mm cell size for maximum airflow. This grid serves as both a protective guard and a ventilation panel.
Parameter Value Unit
length or center-to-center 148 mm
width or center-to-center 116 mm
mesh size 10 mm
dual color no
holes no

📦 Model #2054

1 object(s)
- format STL
Round air vent STL 3D file ∅ 71 mm, slat angle: 40° with central reinforcement
Round air vent STL 3D file ∅ 71 mm, slat angle: 40° with central reinforcement
Model of a round air vent for ventilation in STL format. Its insertion diameter measures 71 mm. The slats have an angle of 40° and a high thickness of 2.4 mm. A centered vertical reinforcement reinforces the slats. This 3D aeration grille has a thin flange of 4 mm. The full diameter of the model is 79 mm.
Parameter Value Unit
male diameter 71 mm
slat angle 40 °
slat thickness 2.4 mm
flange width 4 mm
central reinforcement yes

📦 Model #3587

1 object(s)
- format STL
Honeycomb grid STL file, center-to-center: 270x140mm, mesh: 10mm - Ø5mm
Honeycomb grid STL file, center-to-center: 270x140mm, mesh: 10mm - Ø5mm
Download this honeycomb rectangular grid as a STL file. Mounting holes are placed at the four corners (center-to-center 270x140 mm), each with a diameter of Ø5 mm. The overall dimensions reach 280x150 mm, with very large 10 mm cell size for maximum airflow. This type of grid serves both protection and ventilation roles.
Parameter Value Unit
length or center-to-center 270 mm
width or center-to-center 140 mm
mesh size 10 mm
dual color no
holes yes
hole diameter 5 mm

📦 Model #3671

1 object(s)
- format STL
Tubing adapter STL 3D file ⌀ 27–21 mm (Length: 137 mm)
Tubing adapter STL 3D file ⌀ 27–21 mm (Length: 137 mm)
Straight tube adapter ⌀27 mm to ⌀21 mm in STL 3D format. Length of this fitting is 137 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 31 mm, the smaller one of 71 mm. The ends have no fillet.
Parameter Value Unit
side A length 31 mm
side A outer diameter 27 mm
side A thickness 2 mm
side B length 71 mm
side B outer diameter 21 mm
side B thickness 2 mm
transition length 35 mm
axis offset 0 mm
ends fillet no fillet

📦 Model #3598

1 object(s)
- format STL
Round-to-Rectangular Tube Adapter STL file ⌀81 mm to 108×52 mm, thickness 3 mm + offset
Round-to-Rectangular Tube Adapter STL file ⌀81 mm to 108×52 mm, thickness 3 mm + offset
3D file in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀81 mm and a rectangular section with inner dimensions 108×52 mm. The shell thickness is 3 mm and the total length is 120 mm. The adapter has an offset of 45 mm along the Y axis and 25 mm along the Z axis.
Parameter Value Unit
cylinder outer diameter 81 mm
cylinder inlet length 15 mm
rectangle internal length 108 mm
rectangle internal height 52 mm
rectangle inlet length 15 mm
offset Z 25 mm
offset Y 45 mm
total length 120 mm
thickness 3 mm
chamfer no chamfer

📦 Model #1985

1 object(s)
- format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀75 mm to 125×22 mm, thickness 3 mm + offset
Round-to-Rectangular Tube Adapter STL 3D file ⌀75 mm to 125×22 mm, thickness 3 mm + offset
Download this 3D model in STL format of a round-to-rectangular adapter with an outer diameter of ⌀75 mm and a rectangular section with inner dimensions 125×22 mm. The shell thickness is 3 mm and the overall length is 125 mm. The adapter has an offset of 12.5 mm along the Z axis. Chamfers are applied on the outside of the cylindrical end and on the inside of the rectangular end.
Parameter Value Unit
cylinder outer diameter 75 mm
cylinder inlet length 50 mm
rectangle internal length 125 mm
rectangle internal height 22 mm
rectangle inlet length 50 mm
offset Z 12.5 mm
offset Y 0 mm
total length 125 mm
thickness 3 mm
chamfer chamfers on ...

📦 Model #3574

2 object(s)
- format STL
Honeycomb grid STL file, center-to-center: 300x300mm, mesh: 10mm - Ø5mm
Honeycomb grid STL file, center-to-center: 300x300mm, mesh: 10mm - Ø5mm
View of object #0
Download this square grid file in STL format. Mounting holes are placed at the four corners (center-to-center 300x300 mm), each with a diameter of Ø5 mm. The overall dimensions reach 310x310 mm, with extra wide 10 mm cell size for peak ventilation. A secondary color accent gently outlines the perimeter. This grid serves as both a protective guard and a ventilation panel.
Parameter Value Unit
length or center-to-center 300 mm
width or center-to-center 300 mm
mesh size 10 mm
dual color yes
holes yes
hole diameter 5 mm

📦 Model #2181

2 object(s)
- format STL
Round box with lid STL 3D file ⌀ 20 mm - Height: 100 mm, Shell: 2 mm
Round box with lid STL 3D file ⌀ 20 mm - Height: 100 mm, Shell: 2 mm
View of object #0
Get this cylindrical box in 3D STL format. Its diameter is 20 mm and its total height is 100 mm. The walls have a thickness of 2 mm.
Parameter Value Unit
external diameter 20 mm
total height 100 mm
wall thickness 2 mm
fit clearance 0.1 mm
inner bottom fillet 0 mm

📦 Model #1740

1 object(s)
- format STL
Pipe elbow STL 3D file 10° ⌀OD: 40 mm ⌀ID: 34.8 mm thickness: 2.6 mm
Pipe elbow STL 3D file 10° ⌀OD: 40 mm ⌀ID: 34.8 mm thickness: 2.6 mm
3D file of a pipe elbow with a 10° angle in STL format. This elbow features an external diameter of 40 mm and an internal diameter of 34.8 mm. This results in a tube thickness of 2.6 mm.
Parameter Value Unit
outer diameter 40 mm
inner diameter 34.8 mm
angle 10 °
end fillets no

📦 Model #3658

1 object(s)
- format STL
Multi-compartment box STL 3D file: 16 compartments of 50×50×30 mm
Multi-compartment box STL 3D file: 16 compartments of 50×50×30 mm
This parametric compartment box provides 16 sections measuring 50×50×30mm each. The total dimensions are 210×210×32mm.
Parameter Value Unit
number of rows 4
number of columns 4
compartment length 50 mm
compartment width 50 mm
compartment height 30 mm
wall thickness 2 mm
compartment fillet (radius) 1 mm

📦 Model #3686

1 object(s)
- format STL
Round air vent STL file ∅ 100 mm, slat angle: 10°
Round air vent STL file ∅ 100 mm, slat angle: 10°
Design of a round vent cover for ventilation in STL format. Its insertion diameter measures 100 mm. The slats have a slight angle of 10° and a high thickness of 2 mm. This 3D vent grille features a prominent flange of 20 mm. The full diameter of this model is 140 mm.
Parameter Value Unit
male diameter 100 mm
slat angle 10 °
slat thickness 2 mm
flange width 20 mm
central reinforcement no

STL: Advantages and Disadvantages for 3D Printing

The STL format is, without question, a cornerstone of 3D printing. This exchange format has established itself as the universal standard for representing 3D models ever since the early days of stereolithography. Its main strength lies in its simplicity: it describes the surface of an object using countless small triangles that form a mesh. This approach, known as tessellation, makes STL 3D files universally compatible with nearly all CAD software and slicers. If you’d like to learn more about this format, check out our article STL: What Is This 3D File Format?.

One of the major advantages of the format lies in this universality: whether you’re using a complex modeling program or a simpler design tool, you can export your 3D models in STL 3D format with near certainty that they’ll be interpreted correctly by your 3D printer. This ease of exchange has played a key role in the widespread adoption of 3D printing, allowing anyone to share and print objects without worrying about software compatibility. Once again, simplicity is its greatest strength.

However, that same simplicity also brings certain limitations. The triangle mesh, while effective for describing geometry, contains no information about colors, textures, or materials. For more advanced projects requiring these details, the STL format starts to show its weaknesses. Additionally, print quality depends directly on the fineness of the tessellation: too few triangles can lead to rough or faceted surfaces, while an overly dense mesh can make the file unnecessarily heavy.

Another notable drawback is the lack of unit management. An STL file doesn’t specify whether dimensions are in millimeters, centimeters, or inches, which can sometimes cause scaling errors when importing into a slicer. Despite these limitations, the STL format remains the go-to standard for converting your 3D models into G-code — the language your printer understands. It continues to be the preferred choice for its robustness and broad compatibility, even as newer formats like 3MF emerge for more specialized needs.

What is parametric modeling?

Parametric modeling is a fundamental approach in computer-aided design (CAD) that reshapes how 3D models are created and managed. Far from being a simple drawing technique, it represents a genuine design philosophy where objects are defined not by fixed shapes, but by variables and intelligent relationships.

This method makes it possible to modify the length, width, or diameter of a part and have the entire design adapt automatically, without the need to redraw everything. At the core of the process are parameters—numerical values (length, angle, thickness, etc.)—linked together through constraints and formulas. For instance, the diameter of a hole can be defined as half the width of a plate; if the width changes, the hole’s diameter instantly adjusts, ensuring the consistency of the design. This interdependence makes 3D models flexible and responsive to changes. One of the main advantages of parametric modeling lies in its ability to simplify customization and enable rapid iteration of designs.

Whether through modeling software such as Fusion 360 or FreeCAD, or through code-based libraries like build123d, this approach allows effortless exploration of a wide range of variations. Such flexibility is especially valuable across multiple fields—from mechanical engineering and architecture to consumer product design. It saves considerable time, reduces errors, and improves the performance of parts.

By defining design intent from the start through these parameters and constraints, the model preserves its integrity and functionality even after numerous modifications. It is a powerful way to transform an idea into a tangible object, ready to adapt to new situations.