Can’t find the model? Generate it!

Customize. Download. Print.

To your dimensions in a few clicks!

Pipe elbow STL 3D file 180° ⌀OD: 20 mm ⌀ID: 16 mm thickness: 2 mm

Honeycomb grille STL 3D file, center-to-center: 110x110mm, mesh: 4mm - Ø8mm

L-bracket 200×200 mm STL file, thickness 5 mm, hole diameter 6 mm

Pot STL 3D file, inner: base Ø50 mm, top Ø80 mm, height 70 mm - wall thickness 2 mm

Small parts organizer with 1 drawer 80×80×80 mm STL file, thickness: 3 mm

Protective grid STL 3D file, center-to-center: 70x70mm, mesh: 10mm - Ø4mm

Round box with lid STL 3D file ⌀ 45 mm - Height: 100 mm, Shell: 2 mm

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

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

Bowl STL 3D file, inner: base Ø70 mm, top Ø120 mm, height 70 mm - wall thickness 6 mm

The easiest way to get custom 3D files!

Featured Model

Enclosure with screw-mounted lid STL file: 80×80×20 mm 📦 #1156

2 object(s) - format STL

Latest model generated online:

O-ring STL 3D file ID 158 × CS 2.5 mm 📦 #3885

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 #1857

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter STL file ⌀20 mm to 135×135 mm, thickness 2 mm

Model in STL format of a round-to-rectangular adapter with an outer diameter of ⌀20 mm and a rectangular section with internal dimensions 135×135 mm. The shell thickness is 2 mm and the overall length is 120 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	20	mm
cylinder inlet length	50	mm
rectangle internal length	135	mm
rectangle internal height	135	mm
rectangle inlet length	40	mm
offset Z	0	mm
offset Y	0	mm
total length	120	mm
thickness	2	mm
chamfer	chamfers on ...

📦 Model #1484

2 object(s)

- format STL

Round box with lid STL file ⌀ 96 mm - Height: 170 mm, Shell: 3 mm

Download this cylindrical storage box in STL format. Its diameter is 96 mm and its height is 170 mm. The walls have a thickness of 3 mm. A fillet located at the bottom of the box makes it easier to grip objects located inside.

Parameter	Value	Unit
external diameter	96	mm
total height	170	mm
wall thickness	3	mm
fit clearance	1	mm
inner bottom fillet	2	mm

📦 Model #1477

1 object(s)

- format STL

Tube adapter STL file ⌀ 110–100 mm (Length: 270 mm)

Diameter adapter ⌀110 mm to ⌀100 mm in STL format. Final length of this sleeve is 270 mm. The thickness of the tubes is identical: 5 mm. The larger-diameter tube has a length of 150 mm, the smaller one of 100 mm. The ends have a fillet on the outside.

Parameter	Value	Unit
side A length	150	mm
side A outer diameter	110	mm
side A thickness	5	mm
side B length	100	mm
side B outer diameter	100	mm
side B thickness	5	mm
transition length	20	mm
axis offset	0	mm
ends fillet	fillet on th...

📦 Model #3577

1 object(s)

- format STL

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 #1265

1 object(s)

- format STL

Round air vent STL 3D file ∅ 300 mm, slat angle: 10° with central reinforcement

Model of a round air vent for ventilation in STL format. Its insertion diameter measures 300 mm. The slats have a slight angle of 10° and a low thickness of 1.4 mm. A central reinforcement secures the whole structure. This 3D aeration grille features a collar of 10 mm. The full diameter of this model is 320 mm.

Parameter	Value	Unit
male diameter	300	mm
slat angle	10	°
slat thickness	1.4	mm
flange width	10	mm
central reinforcement	yes

📦 Model #3576

1 object(s)

- format STL

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 #3590

1 object(s)

- format STL

Honeycomb grid STL file, 170x85mm, mesh: 5mm

Rectangular honeycomb grid file in STL format. The overall size is 170x85 mm, with standard 5 mm cell size for versatile use. This grid provides both mechanical protection and airflow.

Parameter	Value	Unit
length or center-to-center	170	mm
width or center-to-center	85	mm
mesh size	5	mm
dual color	no
holes	no

📦 Model #1772

1 object(s)

- format STL

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 #1843

1 object(s)

- format STL

Tube adapter STL file ⌀ 250–60 mm (Length: 80 mm)

Inline tube reducer ⌀250 mm to ⌀60 mm in STL format. Length of this reducer is 80 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 20 mm, the smaller one of 20 mm as well. The ends are not rounded.

Parameter	Value	Unit
side A length	20	mm
side A outer diameter	250	mm
side A thickness	2	mm
side B length	20	mm
side B outer diameter	60	mm
side B thickness	2	mm
transition length	40	mm
axis offset	0	mm
ends fillet	no fillet

📦 Model #3599

1 object(s)

- format STL

Washer / Flat Gasket STL 3D file ⌀ID: 10 mm ⌀OD: 30 mm thickness: 3 mm

File of washer / flat gasket in STL 3D file format. This part has an inner diameter of ⌀10 mm and an outer diameter of ⌀30 mm. The part thickness is 3 mm. There is no finish present.

Parameter	Value	Unit
inner diameter	10	mm
outer diameter	30	mm
thickness	3	mm
finish	none

📦 Model #3594

1 object(s)

- format STL

Washer / Flat Gasket STL 3D file ⌀ID: 30.5 mm ⌀OD: 31.5 mm thickness: 0.5 mm + chamfers

Download this 3D model of flat gasket / washer in STL file format. This model has an inner diameter of ⌀30.5 mm and an outer diameter of ⌀31.5 mm. The total thickness is 0.5 mm. Chamfers are applied on both the inner diameter and the outer diameter, each with a value of 0.1 mm.

Parameter	Value	Unit
inner diameter	30.5	mm
outer diameter	31.5	mm
thickness	0.5	mm
finish	chamfer
finish position	inner + oute...
sides	one side
finish value	0.1	mm

📦 Model #3584

1 object(s)

- format STL

Pipe elbow STL 3D file 90° ⌀OD: 27.5 mm ⌀ID: 25.5 mm thickness: 1 mm

Model of a tubing elbow with a 90° angle in STL format. This pipe elbow has an external diameter of 27.5 mm and an internal diameter of 25.5 mm. This results in a tube thickness of 1 mm.

Parameter	Value	Unit
outer diameter	27.5	mm
inner diameter	25.5	mm
angle	90	°
end fillets	no

📦 Model #1886

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter STL file ⌀81 mm to 106×50 mm, thickness 3 mm + offset

Download this 3D model in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀81 mm and a rectangular section with internal dimensions 106×50 mm. The shell thickness is 3 mm and the overall length is 100 mm. The adapter has an offset of 25 mm along the Y axis and 25 mm along the Z axis. Chamfers are applied on the outside of the cylindrical end and on the inside of the rectangular end to ease insertion.

Parameter	Value	Unit
cylinder outer diameter	81	mm
cylinder inlet length	20	mm
rectangle internal length	106	mm
rectangle internal height	50	mm
rectangle inlet length	30	mm
offset Z	25	mm
offset Y	25	mm
total length	100	mm
thickness	3	mm
chamfer	chamfers on ...

📦 Model #3597

1 object(s)

- format STL

Round air vent STL 3D file ∅ 78 mm, slat angle: 30°

3D design of a round air vent for ventilation in STL format. Its insertion diameter measures 78 mm. The slats have a slight angle of 30° and a high thickness of 2 mm. This 3D vent cover features a prominent flange of 20 mm. The overall diameter of this model is 118 mm.

Parameter	Value	Unit
male diameter	78	mm
slat angle	30	°
slat thickness	2	mm
flange width	20	mm
central reinforcement	no

📦 Model #3588

1 object(s)

- format STL

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 #3570

1 object(s)

- format STL

Tube clip holder Ø31 mm STL 3D file · Countersunk screw Ø3 mm

3D model of a Ø31 mm snap-on tube holder in STL format. The fastening is done by means of a flat head screw Ø3 mm. This snap-on tube holder is designed for a secure hold with easy setup.

Parameter	Value	Unit
tube diameter	31	mm
hole diameter	3	mm
countersunk screw	yes

📦 Model #3574

2 object(s)

- format STL

Honeycomb grid STL file, center-to-center: 300x300mm, mesh: 10mm - Ø5mm

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 #1925

1 object(s)

- format STL

Tube adapter STL file ⌀ 15–9 mm (Length: 40 mm)

Tube adapter ⌀15 mm to ⌀9 mm in STL 3D format. Total length of this adapter is 40 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 10 mm, the smaller one of 10 mm as well. The two axes of the tubes are offset by 2.9 mm. The ends are not rounded.

Parameter	Value	Unit
side A length	10	mm
side A outer diameter	15	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	2.9	mm
ends fillet	no fillet

📦 Model #1751

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter STL 3D file ⌀150 mm to 235×80 mm, thickness 2 mm + offset

3D model in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀150 mm and a rectangular section with inner dimensions 235×80 mm. The wall thickness is 2 mm and the total length is 235 mm. The adapter has an offset of 60 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	150	mm
cylinder inlet length	30	mm
rectangle internal length	235	mm
rectangle internal height	80	mm
rectangle inlet length	30	mm
offset Z	60	mm
offset Y	0	mm
total length	235	mm
thickness	2	mm
chamfer	chamfers on ...

📦 Model #1740

1 object(s)

- format STL

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 #1247

2 object(s)

- format STL

Enclosure with screw-mounted lid STL file: 200×130×60 mm (with ventilation on the lid and under the enclosure)

Enclosure with screwed lid in 3D STL format. The dimensions are 200 mm long by 130 mm wide and 60 mm high. The cover only is 10 mm high. Wall thickness is 3 mm. This enclosure features cooling area on the lid and under the base.

Parameter	Value	Unit
length	200	mm
width	130	mm
total height	60	mm
lid height	10	mm
wall thickness	3	mm
screw margin	0	mm
fit clearance	0.1	mm
cooling level	3
cooling zone(s)	cutouts on b...

📦 Model #3580

1 object(s)

- format STL

Shelf bracket 125×100 mm STL file, thickness 12 mm, hole diameter 5 mm

Download this file of an angle bracket with a central reinforcing bar in STL 3D format. The dimensions are 125 mm in length, 100 mm in height, 20 mm in width, and 12 mm in thickness. The mounting holes have a diameter of 5 mm. Chamfers are done to the holes to seat the screw heads. The reinforcing bar enhances mechanical strength and provides two clearances for fastening. This bracket prints without support, printed flat on the print bed.

Parameter	Value	Unit
length	125	mm
height	100	mm
width	20	mm
thickness	12	mm
hole diameter	5	mm
chamfer on the holes	yes

📦 Model #1226

1 object(s)

- format STL

Multi-compartment box STL file: 8 compartments of 100×100×100 mm

This printable sectioned box includes 8 storage spaces measuring 100×100×100mm each. Overall dimensions are 206×410×102mm. A 4mm fillet applied to all compartments help with item retrieval stored in the box.

Parameter	Value	Unit
number of rows	4
number of columns	2
compartment length	100	mm
compartment width	100	mm
compartment height	100	mm
wall thickness	2	mm
compartment fillet (radius)	4	mm

📦 Model #3565

2 object(s)

- format STL

Round box with lid STL 3D file ⌀ 30 mm - Height: 160 mm, Shell: 3 mm

Get this cylindrical storage box in 3D STL format. Its diameter is 30 mm and its height is 160 mm. The wall thickness is 3 mm. A fillet located at the bottom of the box makes it easier to grab objects.

Parameter	Value	Unit
external diameter	30	mm
total height	160	mm
wall thickness	3	mm
fit clearance	0.1	mm
inner bottom fillet	2	mm

📦 Model #3587

1 object(s)

- format STL

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 #1924

1 object(s)

- format STL

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 #3559

1 object(s)

- format STL

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 #3573

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter STL file ⌀81 mm to 102×46 mm, thickness 3 mm + offset

3D model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀81 mm and a rectangular section with internal dimensions 102×46 mm. The shell thickness is 3 mm and the total length is 100 mm. The adapter has an offset of 25 mm along the Y axis and 25 mm along the Z axis.

Parameter	Value	Unit
cylinder outer diameter	81	mm
cylinder inlet length	20	mm
rectangle internal length	102	mm
rectangle internal height	46	mm
rectangle inlet length	30	mm
offset Z	25	mm
offset Y	25	mm
total length	100	mm
thickness	3	mm
chamfer	no chamfer

📦 Model #3598

1 object(s)

- format STL

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 #1928

1 object(s)

- format STL

Tube adapter STL 3D file ⌀ 94–80 mm (Length: 80 mm)

Inline sleeve ⌀94 mm to ⌀80 mm in STL 3D format. Total length of this coupler is 80 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 20 mm, the smaller one of 50 mm. The axes of the tubes are off-center by 5.9 mm. The ends are rounded on the outside.

Parameter	Value	Unit
side A length	20	mm
side A outer diameter	94	mm
side A thickness	2	mm
side B length	50	mm
side B outer diameter	80	mm
side B thickness	2	mm
transition length	10	mm
axis offset	5.9	mm
ends fillet	fillet on th...

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.