?>

Can’t find the model? Generate it!

Customize. Download. Print.

To your dimensions in a few clicks!

The easiest way to get custom 3D files!

Featured Model

Round-to-Rectangular Tube Adapter STL file ⌀60 mm to 60×30 mm, thickness 2 mm + offset 📦 #2166

1 object(s) - format STL

gizmo

Latest model generated online:

Tube adapter STL 3D file ⌀ 68–54 mm (Length: 85 mm) 📦 #3462

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 #1811

1 object(s)
- format STL
Round-to-Rectangular Tube Adapter STL file ⌀20.3 mm to 20×10 mm, thickness 2 mm + offset
Round-to-Rectangular Tube Adapter STL file ⌀20.3 mm to 20×10 mm, thickness 2 mm + offset
Model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀20.3 mm and a rectangular section with internal dimensions 20×10 mm. The wall thickness is 2 mm and the total length is 75 mm. The adapter has an offset of 3 mm along the Z axis. Chamfers are present on the outside of the cylindrical end and on the inside of the rectangular end.
Parameter Value Unit
cylinder outer diameter 20.3 mm
cylinder inlet length 25 mm
rectangle internal length 20 mm
rectangle internal height 10 mm
rectangle inlet length 30 mm
offset Z 3 mm
offset Y 0 mm
total length 75 mm
thickness 2 mm
chamfer chamfers on ...

📦 Model #3306

1 object(s)
- format STL
Honeycomb grid STL file, 178x127mm, mesh: 5mm
Honeycomb grid STL file, 178x127mm, mesh: 5mm
Rectangular protective honeycomb grid file in STL format. The overall size is 178x127 mm, with standard 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 178 mm
width or center-to-center 127 mm
mesh size 5 mm
dual color no
holes no

📦 Model #3315

1 object(s)
- format STL
Round-to-Rectangular Tube Adapter STL file ⌀106 mm to 92.6×71 mm, thickness 2 mm + offset
Round-to-Rectangular Tube Adapter STL file ⌀106 mm to 92.6×71 mm, thickness 2 mm + offset
Model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀106 mm and a rectangular section with internal dimensions 92.6×71 mm. The shell thickness is 2 mm and the overall length is 170 mm. The adapter has an offset of 25 mm along the Z axis.
Parameter Value Unit
cylinder outer diameter 106 mm
cylinder inlet length 50 mm
rectangle internal length 92.6 mm
rectangle internal height 71 mm
rectangle inlet length 70 mm
offset Z 25 mm
offset Y 0 mm
total length 170 mm
thickness 2 mm
chamfer no chamfer

📦 Model #3316

1 object(s)
- format STL
O-ring STL 3D file ID 18.2 × CS 2 mm
O-ring STL 3D file ID 18.2 × CS 2 mm
Model of rubber ring with Internal diameter (ID) 18.2 mm / CS (cross section) 2  mm. Outer diameter (OD) corresponds to 22.2 mm.
Parameter Value Unit
inner diameter (ID) 18.2 mm
cross section (CS) 2 mm

📦 Model #3329

1 object(s)
- format STL
Tubing elbow STL file 30° ⌀OD: 129 mm ⌀ID: 125 mm thickness: 2 mm
Tubing elbow STL file 30° ⌀OD: 129 mm ⌀ID: 125 mm thickness: 2 mm
File of a tubing elbow with a 30° angle in STL format. This pipe elbow has an external diameter of 129 mm and an internal diameter of 125 mm. The tube thickness is therefore 2 mm.
Parameter Value Unit
outer diameter 129 mm
inner diameter 125 mm
angle 30 °
end fillets no

📦 Model #816

1 object(s)
- format STL
U-shaped handle STL file 35×100×14 mm (Center-to-center 86 mm)
U-shaped handle STL file 35×100×14 mm (Center-to-center 86 mm)
Download this STL 3D model of a simple U-shaped handle. The overall dimensions are 35×100×14 mm. The handle has a square section and a right-angled transition. The holes are 6 mm diameter with a center-to-center distance of 86 mm.
Parameter Value Unit
width 35 mm
length 100 mm
thickness 14 mm
shape (0:square,1:circle) 0
transition (0:right,1:rounded) 0
fillet radius 0 mm
hole diameter 6 mm

📦 Model #3322

1 object(s)
- format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀106 mm to 220×110 mm, thickness 2 mm + offset
Round-to-Rectangular Tube Adapter STL 3D file ⌀106 mm to 220×110 mm, thickness 2 mm + offset
Model in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀106 mm and a rectangular section with internal dimensions 220×110 mm. The shell thickness is 2 mm and the total length is 290 mm. The adapter has an offset of 60 mm along the Y axis.
Parameter Value Unit
cylinder outer diameter 106 mm
cylinder inlet length 50 mm
rectangle internal length 220 mm
rectangle internal height 110 mm
rectangle inlet length 40 mm
offset Z 0 mm
offset Y 60 mm
total length 290 mm
thickness 2 mm
chamfer no chamfer

📦 Model #3345

2 object(s)
- format STL
Enclosure with screw-mounted lid STL 3D file: 120×100×55 mm (with ventilation under the enclosure)
Enclosure with screw-mounted lid STL 3D file: 120×100×55 mm (with ventilation under the enclosure)
View of object #0
Download this enclosure model with lid in STL format. The dimensions are 120 mm long by 100 mm wide and 55 mm high. The lid is 15 mm high. Wall thickness is 3 mm. This enclosure has marked cooling area under the base.
Parameter Value Unit
length 120 mm
width 100 mm
total height 55 mm
lid height 15 mm
wall thickness 3 mm
screw margin 0 mm
fit clearance 0.1 mm
cooling level 10
cooling zone(s) cutouts on t...

📦 Model #2186

1 object(s)
- format STL
Tube adapter STL file ⌀ 52–25 mm (Length: 105 mm)
Tube adapter STL file ⌀ 52–25 mm (Length: 105 mm)
Tube junction ⌀52 mm to ⌀25 mm in STL 3D format. Final length of this junction is 105 mm. The larger-diameter tube has a thickness of 6 mm and a sleeve length of 40 mm. The smaller-diameter tube has a thickness of 3 mm and a length of 50 mm. The ends have a fillet to make tube connection easier.
Parameter Value Unit
side A length 40 mm
side A outer diameter 52 mm
side A thickness 6 mm
side B length 50 mm
side B outer diameter 25 mm
side B thickness 3 mm
transition length 15 mm
axis offset 0 mm
ends fillet fillet on bo...

📦 Model #948

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 STL 3D file of a simple U-shaped drawer handle. The external dimensions are 50×100×20 mm. This handle features a square profile combined with a softened transition. The openings are 6 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) 1
fillet radius 0 mm
hole diameter 6 mm

📦 Model #1156

2 object(s)
- format STL
Enclosure with screw-mounted lid STL file: 80×80×20 mm
Enclosure with screw-mounted lid STL file: 80×80×20 mm
View of object #0
Download this enclosure model with screwed lid in STL format. The dimensions are 80 mm long by 80 mm wide and 20 mm high. The lid only is 15 mm high. Wall thickness is 4 mm. The enclosure does not have cooling.
Parameter Value Unit
length 80 mm
width 80 mm
total height 20 mm
lid height 15 mm
wall thickness 4 mm
screw margin 0 mm
fit clearance 0.1 mm
cooling zone(s) no cutouts

📦 Model #3326

1 object(s)
- format STL
Tube clip holder Ø16 mm STL file · Flat head screw Ø3 mm
Tube clip holder Ø16 mm STL file · Flat head screw Ø3 mm
Download this 3D file of a Ø16 mm custom pipe holder in STL format. The fastening is achieved by means of a countersunk screw Ø3 mm. This custom pipe clip is built for a firm hold and quick installation.
Parameter Value Unit
tube diameter 16 mm
hole diameter 3 mm
countersunk screw yes

📦 Model #3004

1 object(s)
- format STL
Round-to-Rectangular Tube Adapter STL file ⌀20 mm to 26×26 mm, thickness 2 mm
Round-to-Rectangular Tube Adapter STL file ⌀20 mm to 26×26 mm, thickness 2 mm
Model in STL format of a round-to-rectangular adapter with an external diameter of ⌀20 mm and a rectangular section with inner dimensions 26×26 mm. The shell thickness is 2 mm and the total length is 90 mm.
Parameter Value Unit
cylinder outer diameter 20 mm
cylinder inlet length 30 mm
rectangle internal length 26 mm
rectangle internal height 26 mm
rectangle inlet length 40 mm
offset Z 0 mm
offset Y 0 mm
total length 90 mm
thickness 2 mm
chamfer no chamfer

📦 Model #891

1 object(s)
- format STL
U-shaped handle STL file 35×140×20 mm (Center-to-center 120 mm)
U-shaped handle STL file 35×140×20 mm (Center-to-center 120 mm)
Download this 3D file of a U-shaped handle. The external dimensions are 35×140×20 mm. The handle features a square section combined with a right-angled transition. A fillet ensures a better tactile feel. The holes are 6 mm diameter and have a 120 mm center-to-center distance.
Parameter Value Unit
width 35 mm
length 140 mm
thickness 20 mm
shape (0:square,1:circle) 0
transition (0:right,1:rounded) 0
fillet radius 1 mm
hole diameter 6 mm

📦 Model #892

1 object(s)
- format STL
U-shaped handle STL file 35×140×20 mm (Center-to-center 120 mm)
U-shaped handle STL file 35×140×20 mm (Center-to-center 120 mm)
Download this STL 3D file of a basic U-shaped handle. The external dimensions are 35×140×20 mm. The handle features a square cross-section combined with a softened transition. The mounting holes are 4 mm diameter with a center-to-center distance of 120 mm.
Parameter Value Unit
width 35 mm
length 140 mm
thickness 20 mm
shape (0:square,1:circle) 0
transition (0:right,1:rounded) 1
fillet radius 0 mm
hole diameter 4 mm

📦 Model #3268

1 object(s)
- format STL
Washer / Flat Gasket STL 3D file ⌀ID: 27 mm ⌀OD: 37 mm thickness: 1 mm + chamfers
Washer / Flat Gasket STL 3D file ⌀ID: 27 mm ⌀OD: 37 mm thickness: 1 mm + chamfers
Download this file of washer / flat gasket in STL format. This model has an inner diameter of ⌀27 mm and an outer diameter of ⌀37 mm. The total thickness is 1 mm. Chamfers are applied on both the inner diameter and the outer diameter, each with a value of 0.4 mm. These finishes are applied on both faces.
Parameter Value Unit
inner diameter 27 mm
outer diameter 37 mm
thickness 1 mm
finish chamfer
finish position inner + oute...
sides two sides
finish value 0.4 mm

📦 Model #1007

1 object(s)
- format STL
U-shaped handle STL file 50×140×20 mm (Center-to-center 120 mm)
U-shaped handle STL file 50×140×20 mm (Center-to-center 120 mm)
Download this file of a simple U-shaped drawer handle. The external dimensions are 50×140×20 mm. The handle has a round cross-section combined with a straight transition. The bores are 5 mm diameter and have a 120 mm center-to-center distance.
Parameter Value Unit
width 50 mm
length 140 mm
thickness 20 mm
shape (0:square,1:circle) 1
transition (0:right,1:rounded) 0
fillet radius 0 mm
hole diameter 5 mm

📦 Model #1558

1 object(s)
- format STL
Round air vent STL 3D file ∅ 90 mm, slat angle: 35° with central reinforcement
Round air vent STL 3D file ∅ 90 mm, slat angle: 35° with central reinforcement
Design of a round grille for air circulation in STL format. Its insertion diameter is 90 mm. The slats have an angle of 35° and a high thickness of 2.4 mm. A centered vertical reinforcement strengthens the whole structure. This aeration grille features a prominent flange of 18 mm. The total diameter of the model is 126 mm.
Parameter Value Unit
male diameter 90 mm
slat angle 35 °
slat thickness 2.4 mm
flange width 18 mm
central reinforcement yes

📦 Model #1458

1 object(s)
- format STL
Tube adapter STL 3D file ⌀ 104–50 mm (Length: 85 mm)
Tube adapter STL 3D file ⌀ 104–50 mm (Length: 85 mm)
Inline tube reducer ⌀104 mm to ⌀50 mm in STL 3D format. Total length of this adapter is 85 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 25 mm. The two axes of the tubes are off-center by 26.9 mm. The ends are rounded on the inside to facilitate the connection of the two tubes.
Parameter Value Unit
side A length 30 mm
side A outer diameter 104 mm
side A thickness 2 mm
side B length 25 mm
side B outer diameter 50 mm
side B thickness 2 mm
transition length 30 mm
axis offset 26.9 mm
ends fillet fillet on th...

📦 Model #3324

1 object(s)
- format STL
Protective grid STL file, 61x50mm, mesh: 5mm
Protective grid STL file, 61x50mm, mesh: 5mm
Download this honeycomb rectangular grid file in STL format. The overall size is 61x50 mm, with regular 5 mm cell size for balanced airflow and protection. This type of grid provides mechanical protection and ventilation.
Parameter Value Unit
length or center-to-center 61 mm
width or center-to-center 50 mm
mesh size 5 mm
dual color no
holes no

📦 Model #1323

1 object(s)
- format STL
Multi-compartment box STL 3D file: 100 compartments of 50×5×50 mm
Multi-compartment box STL 3D file: 100 compartments of 50×5×50 mm
This compartment box design includes 100 compartments measuring 50×5×50mm each. Overall dimensions are 522×72×52mm. Fillets of 2mm applied to all compartments help with item retrieval stored in the box.
Parameter Value Unit
number of rows 10
number of columns 10
compartment length 50 mm
compartment width 5 mm
compartment height 50 mm
wall thickness 2 mm
compartment fillet (radius) 2 mm

📦 Model #1617

1 object(s)
- format STL
Round-to-Rectangular Tube Adapter STL 3D file ⌀26 mm to 35×20 mm, thickness 3 mm + offset
Round-to-Rectangular Tube Adapter STL 3D file ⌀26 mm to 35×20 mm, thickness 3 mm + offset
Model in STL format of a round-to-rectangular adapter with an outer diameter of ⌀26 mm and a rectangular section with internal dimensions 35×20 mm. The wall thickness is 3 mm and the overall length is 60 mm. The adapter has an offset of 12.5 mm along the Z axis.
Parameter Value Unit
cylinder outer diameter 26 mm
cylinder inlet length 15 mm
rectangle internal length 35 mm
rectangle internal height 20 mm
rectangle inlet length 20 mm
offset Z 12.5 mm
offset Y 0 mm
total length 60 mm
thickness 3 mm
chamfer no chamfer

📦 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 #3233

1 object(s)
- format STL
O-ring STL 3D file ID 23.5 × CS 2.5 mm
O-ring STL 3D file ID 23.5 × CS 2.5 mm
3D model in STL format of O-ring (torus-shaped seal) with dimensions ID 23.5 mm by CS (cross section) 2.5  mm. Final diameter resulting corresponds to 28.5 mm.
Parameter Value Unit
inner diameter (ID) 23.5 mm
cross section (CS) 2.5 mm

📦 Model #3320

1 object(s)
- format STL
Round-to-Rectangular Tube Adapter STL file ⌀106 mm to 220×110 mm, thickness 2 mm + offset
Round-to-Rectangular Tube Adapter STL file ⌀106 mm to 220×110 mm, thickness 2 mm + offset
3D file in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀106 mm and a rectangular section with internal dimensions 220×110 mm. The wall thickness is 2 mm and the overall length is 290 mm. The adapter has an offset of 60 mm along the Z axis.
Parameter Value Unit
cylinder outer diameter 106 mm
cylinder inlet length 50 mm
rectangle internal length 220 mm
rectangle internal height 110 mm
rectangle inlet length 40 mm
offset Z 60 mm
offset Y 0 mm
total length 290 mm
thickness 2 mm
chamfer no chamfer

📦 Model #953

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 handle. The external dimensions are 50×100×20 mm. This handle has a circular profile and a straight transition. The bores 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) 1
transition (0:right,1:rounded) 0
fillet radius 0 mm
hole diameter 5 mm

📦 Model #1266

1 object(s)
- format STL
Round air vent STL file ∅ 100 mm, slat angle: 45° with central reinforcement
Round air vent STL file ∅ 100 mm, slat angle: 45° with central reinforcement
File of a round air vent for ventilation in STL format. Its male diameter measures 100 mm. The slats have an angle of 45° and a low thickness of 1.4 mm. A centered vertical reinforcement strengthens the whole structure. This 3D vent grille features a thin flange of 5 mm. The overall diameter of the model is 110 mm.
Parameter Value Unit
male diameter 100 mm
slat angle 45 °
slat thickness 1.4 mm
flange width 5 mm
central reinforcement yes

📦 Model #1168

2 object(s)
- format STL
Enclosure with screw-mounted lid STL 3D file: 60×40×20 mm
Enclosure with screw-mounted lid STL 3D file: 60×40×20 mm
View of object #0
Download this enclosure with screwed lid in STL format. The dimensions are 60 mm long by 40 mm wide and 20 mm high. The cover is 10 mm high. Wall thickness is 2 mm. The enclosure does not feature cooling.
Parameter Value Unit
length 60 mm
width 40 mm
total height 20 mm
lid height 10 mm
wall thickness 2 mm
screw margin 0 mm
fit clearance 0.1 mm
cooling zone(s) no cutouts

📦 Model #3297

1 object(s)
- format STL
Tubing adapter STL 3D file ⌀ 67–50 mm (Length: 80 mm)
Tubing adapter STL 3D file ⌀ 67–50 mm (Length: 80 mm)
Inline sleeve ⌀67 mm to ⌀50 mm in STL 3D format. Length of this fitting is 80 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 30 mm, the smaller one of 30 mm as well. The ends feature a fillet to make tube connection easier.
Parameter Value Unit
side A length 30 mm
side A outer diameter 67 mm
side A thickness 3 mm
side B length 30 mm
side B outer diameter 50 mm
side B thickness 3 mm
transition length 20 mm
axis offset 0 mm
ends fillet fillet on bo...

📦 Model #3056

1 object(s)
- format STL
Round air vent STL file ∅ 99 mm, slat angle: 20°
Round air vent STL file ∅ 99 mm, slat angle: 20°
Model of a round grille for air circulation in STL format. Its insertion diameter is 99 mm. The slats have a slight angle of 20° and a high thickness of 2 mm. This ventilation grille has a prominent flange of 16 mm. The total diameter of the model is 131 mm.
Parameter Value Unit
male diameter 99 mm
slat angle 20 °
slat thickness 2 mm
flange width 16 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.