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Pipe elbow STL 3D file 90° ⌀OD: 40 mm ⌀ID: 34 mm thickness: 3 mm

Pipe elbow STL file 120° ⌀OD: 40 mm ⌀ID: 34 mm thickness: 3 mm

Honeycomb grille STL file, center-to-center: 230x30mm, mesh: 8mm - Ø5mm

Enclosure with screw-mounted lid STL 3D file: 120×100×45 mm (with ventilation on the lid)

Round box with lid STL file ⌀ 45 mm - Height: 40 mm, Shell: 2 mm

Tube adapter STL file ⌀ 60–30 mm (Length: 140 mm)

Round air vent STL 3D file ∅ 152 mm, slat angle: 45° with central reinforcement

Round box with lid STL 3D file ⌀ 100 mm - Height: 20 mm, Shell: 3 mm

Tube adapter STL file ⌀ 100–60 mm (Length: 70 mm)

Mounting bracket 120×120 mm STL file, thickness 8 mm, hole diameter 5 mm

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

Latest model generated online:

Protective grid STL file, center-to-center: 108x108mm, mesh: 10mm - Ø6mm 📦 #3490

1 object(s) - format STL

From the blog

Modify 3D geometry in the slicer

2025-11-14 · 3D Modeling · sylvain

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 #3322

1 object(s)

- format STL

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 #1323

1 object(s)

- format STL

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 #2085

1 object(s)

- format STL

Pipe elbow STL file 45° ⌀OD: 109.5 mm ⌀ID: 102.7 mm thickness: 3.4 mm

3D file of an elbow with a 45° angle in STL format. This elbow features an external diameter of 109.5 mm and an internal diameter of 102.7 mm. This results in a tube thickness of 3.4 mm.

Parameter	Value	Unit
outer diameter	109.5	mm
inner diameter	102.7	mm
angle	45	°
end fillets	no

📦 Model #2846

1 object(s)

- format STL

Corner bracket 250×250 mm STL 3D file, thickness 12 mm, hole diameter 5 mm

Download this file of a support bracket reinforced in STL format. The dimensions are 250 mm in length, 250 mm in height, 25 mm in width, and 12 mm in thickness. The mounting holes have a diameter of 5 mm. Chamfers are done to the holes for a cleaner fit of the screws. The central reinforcement bar reduces bending and provides two passages for fastening. This bracket prints without support, lying flat on the build plate.

Parameter	Value	Unit
length	250	mm
height	250	mm
width	25	mm
thickness	12	mm
hole diameter	5	mm
chamfer on the holes	yes

📦 Model #3271

1 object(s)

- format STL

Tubing elbow STL file 1° ⌀OD: 76 mm ⌀ID: 70 mm thickness: 3 mm

3D file of an elbow with a 1° angle in STL format. This elbow has an external diameter of 76 mm and an internal diameter of 70 mm. The tube thickness is therefore 3 mm.

Parameter	Value	Unit
outer diameter	76	mm
inner diameter	70	mm
angle	1	°
end fillets	no

📦 Model #3272

1 object(s)

- format STL

Tube elbow STL 3D file 30° ⌀OD: 76 mm ⌀ID: 70 mm thickness: 3 mm

3D model of a tubing elbow with a 30° angle in STL format. This elbow features an external diameter of 76 mm and an internal diameter of 70 mm. This results in a tube thickness of 3 mm.

Parameter	Value	Unit
outer diameter	76	mm
inner diameter	70	mm
angle	30	°
end fillets	no

📦 Model #2998

1 object(s)

- format STL

Shelf bracket 200×200 mm STL 3D file, thickness 6 mm, hole diameter 5 mm

Model of a corner bracket reinforced in STL format. The dimensions are 200 mm in length, 200 mm in height, 28 mm in width, and 6 mm in thickness. The mounting holes have a diameter of 5 mm. Chamfers are done to the holes to improve the seating of the heads. The reinforcing bar enhances mechanical strength and includes two clearances for screwdriver access. This bracket prints without support, printed flat on the build plate.

Parameter	Value	Unit
length	200	mm
height	200	mm
width	28	mm
thickness	6	mm
hole diameter	5	mm
chamfer on the holes	yes

📦 Model #1801

1 object(s)

- format STL

Tube adapter STL file ⌀ 110–100 mm (Length: 35 mm)

Tube coupler ⌀110 mm to ⌀100 mm in STL format. Final length of this adapter is 35 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a sleeve length of 20 mm, the smaller one of 10 mm. The ends are raw.

Parameter	Value	Unit
side A length	20	mm
side A outer diameter	110	mm
side A thickness	3	mm
side B length	10	mm
side B outer diameter	100	mm
side B thickness	3	mm
transition length	5	mm
axis offset	0	mm
ends fillet	no fillet

📦 Model #843

1 object(s)

- format STL

U-shaped handle STL 3D file 35×100×20 mm (Center-to-center 80 mm)

Download this STL 3D file of a simple U-shaped handle. The overall dimensions are 35×100×20 mm. This handle has a square section and a smooth transition. A light fillet along the edges allows for improved handling. The holes are 6 mm diameter and have a 80 mm center-to-center distance.

Parameter	Value	Unit
width	35	mm
length	100	mm
thickness	20	mm
shape (0:square,1:circle)	0
transition (0:right,1:rounded)	1
fillet radius	1	mm
hole diameter	6	mm

📦 Model #2598

1 object(s)

- format STL

Container STL 3D file, inner: base Ø40 mm, top Ø75 mm, height 70 mm - wall thickness 2 mm

File of a container in STL format. This container can be used for organizing small parts in a workshop or on a desk. The shape is flared, with a internal height of 70 mm, a internal diameter at the top of 75 mm, and a internal diameter at the bottom of 40 mm. The total height is 72 mm.

Parameter	Value	Unit
inner bottom diameter	40	mm
inner top diameter	75	mm
inner height	70	mm
wall thickness	2	mm

📦 Model #3298

1 object(s)

- format STL

Tube elbow STL file 90° ⌀OD: 22 mm ⌀ID: 18 mm thickness: 2 mm

Model of an elbow with a 90° angle in STL format. This elbow has an outer diameter of 22 mm and an inner diameter of 18 mm. The tube thickness is therefore 2 mm.

Parameter	Value	Unit
outer diameter	22	mm
inner diameter	18	mm
angle	90	°
end fillets	no

📦 Model #2033

1 object(s)

- format STL

Tube adapter STL 3D file ⌀ 35–34 mm (Length: 100 mm)

Tube reducer ⌀35 mm to ⌀34 mm in STL 3D format. Final length of this adapter is 100 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a sleeve length of 40 mm, the smaller one of 40 mm as well. The ends feature a fillet.

Parameter	Value	Unit
side A length	40	mm
side A outer diameter	35	mm
side A thickness	3	mm
side B length	40	mm
side B outer diameter	34	mm
side B thickness	3	mm
transition length	20	mm
axis offset	0	mm
ends fillet	fillet on bo...

📦 Model #2793

1 object(s)

- format STL

Support bracket 150×100 mm STL file, thickness 10 mm, hole diameter 6 mm

File of a corner bracket with a central reinforcing bar in STL 3D format. The dimensions are 150 mm in length, 100 mm in height, 40 mm in width, and 10 mm in thickness. The mounting holes are designed with a diameter of 6 mm. Chamfers are done to the holes to seat the screw heads. The reinforcing bar enhances mechanical strength and provides two clearances for fastening. No support is needed to print this bracket, printed flat on the print bed.

Parameter	Value	Unit
length	150	mm
height	100	mm
width	40	mm
thickness	10	mm
hole diameter	6	mm
chamfer on the holes	yes

📦 Model #1861

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter STL 3D file ⌀31 mm to 70×90 mm, thickness 2 mm

Download this 3D model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀31 mm and a rectangular section with inner dimensions 70×90 mm. The wall thickness is 2 mm and the overall length is 200 mm. Chamfers are present on the outside of the cylindrical end and on the inside of the rectangular end.

Parameter	Value	Unit
cylinder outer diameter	31	mm
cylinder inlet length	50	mm
rectangle internal length	70	mm
rectangle internal height	90	mm
rectangle inlet length	100	mm
offset Z	0	mm
offset Y	0	mm
total length	200	mm
thickness	2	mm
chamfer	chamfers on ...

📦 Model #3329

1 object(s)

- format STL

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 #1509

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter STL 3D file ⌀65 mm to 60×30 mm, thickness 2 mm

File in STL format of a round-to-rectangular adapter with an outer diameter of ⌀65 mm and a rectangular section with inner dimensions 60×30 mm. The wall thickness is 2 mm and the overall length is 80 mm. A chamfer is present on the inside of the rectangular end to ease insertion.

Parameter	Value	Unit
cylinder outer diameter	65	mm
cylinder inlet length	10	mm
rectangle internal length	60	mm
rectangle internal height	30	mm
rectangle inlet length	5	mm
offset Z	0	mm
offset Y	0	mm
total length	80	mm
thickness	2	mm
chamfer	chamfer on t...

📦 Model #1550

1 object(s)

- format STL

Tube adapter STL 3D file ⌀ 111–90 mm (Length: 170 mm)

Tube connector ⌀111 mm to ⌀90 mm in STL format. Final length of this adapter is 170 mm. The thickness of the tubes is identical: 5 mm. The larger-diameter tube has a sleeve length of 70 mm, the smaller one of 80 mm. The ends have a fillet on the outside to ease the connection.

Parameter	Value	Unit
side A length	70	mm
side A outer diameter	111	mm
side A thickness	5	mm
side B length	80	mm
side B outer diameter	90	mm
side B thickness	5	mm
transition length	20	mm
axis offset	0	mm
ends fillet	fillet on th...

📦 Model #2120

2 object(s)

- format STL

Enclosure with screw-mounted lid STL 3D file: 40×40×20 mm (with ventilation on the lid)

Download this enclosure model with lid in STL format. The dimensions are 40 mm long by 40 mm wide and 20 mm high. The lid only is 10 mm high. Wall thickness is 5 mm. This enclosure features marked cooling area on the lid.

Parameter	Value	Unit
length	40	mm
width	40	mm
total height	20	mm
lid height	10	mm
wall thickness	5	mm
screw margin	0	mm
fit clearance	0.1	mm
cooling level	5
cooling zone(s)	cutouts on t...

📦 Model #3313

3 object(s)

- format STL

Small parts organizer with 2 drawers 70×90×150 mm STL 3D file, thickness: 2 mm

Download this 3D model of a drawer organizer in 3D STL format. This model features 2 compartments, arranged in 2 rows and 1 columns. Specifically, this means 2 rows of 1 compartments. Each compartment measures 70 mm wide, 90 mm high, and 150 mm deep. The wall thickness is 2 mm. The compartments feature 2 dividers each, which allows up to 3 compartments per compartment and up to 6 compartments in total. The total size of the box are 78.5 x 191 x 156 mm. All the objects in this model were designed to be printable without support generation.

Parameter	Value	Unit
number of rows	2
number of columns	1
inner drawer depth	150	mm
inner drawer width	70	mm
inner drawer height	90	mm
wall thickness	2	mm
removable divider	two divider ...

📦 Model #3316

1 object(s)

- format STL

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 #3056

1 object(s)

- format STL

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

📦 Model #1558

1 object(s)

- format STL

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 #3370

1 object(s)

- format STL

Box STL 3D file with dimensions 50×50×100 mm

This one-slot box design includes a single compartment measuring 50×50×100mm. Overall dimensions of the box are 70×70×110mm. A 12mm fillet helps with item retrieval inside the compartment. The separators are particularly thick.

Parameter	Value	Unit
number of rows	1
number of columns	1
compartment length	50	mm
compartment width	50	mm
compartment height	100	mm
wall thickness	10	mm
compartment fillet (radius)	12	mm

📦 Model #1611

1 object(s)

- format STL

Pipe elbow STL file 90° ⌀OD: 300 mm ⌀ID: 280 mm thickness: 10 mm

3D file of an elbow with a 90° angle in STL format. This elbow has an external diameter of 300 mm and an internal diameter of 280 mm. The tube thickness is therefore 10 mm.

Parameter	Value	Unit
outer diameter	300	mm
inner diameter	280	mm
angle	90	°
end fillets	no

📦 Model #3306

1 object(s)

- format STL

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 #2992

1 object(s)

- format STL

Mounting bracket 195×195 mm STL 3D file, thickness 12 mm, hole diameter 8 mm

Download this 3D model of a support bracket with a central reinforcement in STL 3D format. The dimensions are 195 mm in length, 195 mm in height, 30 mm in width, and 12 mm in thickness. The screw holes are designed with a diameter of 8 mm. Chamfers are done to the holes to improve the seating of the heads. The central reinforcement bar reduces bending and provides two passages for fastening. This bracket prints without support, printed flat directly on the build plate.

Parameter	Value	Unit
length	195	mm
height	195	mm
width	30	mm
thickness	12	mm
hole diameter	8	mm
chamfer on the holes	yes

📦 Model #2253

2 object(s)

- format STL

Small parts organizer with 1 drawer 75×70×75 mm STL file, thickness: 2 mm

3D file of a storage box with drawers in STL format. This model features 1 box, arranged in 1 rows and 1 columns. In detail, this means 1 rows of 1 boxes. Each box measures 75 mm wide, 70 mm high, and 75 mm deep. The wall thickness is 2 mm. The external dimensions of the structure are 83.5 x 76.5 x 81 mm. All the objects in this model are intended to be printed without support.

Parameter	Value	Unit
number of rows	1
number of columns	1
inner drawer depth	75	mm
inner drawer width	75	mm
inner drawer height	70	mm
wall thickness	2	mm
removable divider	none

📦 Model #3345

2 object(s)

- format STL

Enclosure with screw-mounted lid STL 3D file: 120×100×55 mm (with ventilation under the enclosure)

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 #2968

1 object(s)

- format STL

Angle bracket 250×200 mm STL file, thickness 12 mm, hole diameter 6 mm

Download this 3D model of a corner bracket with a central reinforcement in STL 3D format. The dimensions are 250 mm in length, 200 mm in height, 30 mm in width, and 12 mm in thickness. The holes are designed with a diameter of 6 mm. Chamfers are applied to the holes to seat the screw heads. The central reinforcement bar improves rigidity and provides two clearances for screwdriver access. This bracket prints without support, lying flat directly on the build plate.

Parameter	Value	Unit
length	250	mm
height	200	mm
width	30	mm
thickness	12	mm
hole diameter	6	mm
chamfer on the holes	yes

📦 Model #3328

2 object(s)

- format STL

Enclosure with screw-mounted lid STL file: 180×70×36 mm (with ventilation on the lid and under the enclosure)

Download this enclosure model with lid in STL format. The dimensions are 180 mm long by 70 mm wide and 36 mm high. The lid only measures 10 mm high. Wall thickness is 3 mm. This enclosure has cooling area on the lid and under the base.

Parameter	Value	Unit
length	180	mm
width	70	mm
total height	36	mm
lid height	10	mm
wall thickness	3	mm
screw margin	0	mm
fit clearance	0.1	mm
cooling level	4
cooling zone(s)	cutouts on b...

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.