Free custom STL files and 3D models for 3D printers

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Clip-on tube holder Ø32 mm STL file · Flat head screw Ø4 mm

Multi-compartment box STL 3D file: 14 compartments of 14×14×5 mm

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

Shelf bracket 110×110 mm STL file, thickness 8 mm, hole diameter 6 mm

Tube adapter STL file ⌀ 100–51 mm (Length: 160 mm)

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

Pipe elbow STL 3D file 180° ⌀OD: 18 mm ⌀ID: 16 mm thickness: 1 mm

Round box with lid STL 3D file ⌀ 80 mm - Height: 50 mm, Shell: 3 mm

Round air vent STL 3D file ∅ 70 mm, slat angle: 45° with central reinforcement

Pot STL file, inner: base Ø40 mm, top Ø80 mm, height 50 mm - wall thickness 3 mm

Browse a growing library of free STL files and 3D models for 3D printers, or generate custom parts online with your exact dimensions.

Featured Model

Small parts organizer with 3 drawers 40×80×50 mm STL 3D file, thickness: 2 mm 📦 #2029

2 object(s) - format STL

View of object #0

Latest model generated online:

Small parts organizer with 32 drawers 20×20×20 mm STL file, thickness: 2 mm 📦 #4240

2 object(s) - format STL

View of object #0

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 #2053

1 object(s)

- format STL

Round air vent STL file ∅ 71 mm, slat angle: 45° with central reinforcement

3D file of a round air vent for ventilation in STL format. Its insertion diameter measures 71 mm. The slats have an angle of 45° and a high thickness of 2.4 mm. A central reinforcement strengthens the slats. This ventilation grille has a prominent flange of 20 mm. The overall diameter of this model is 111 mm.

Parameter	Value	Unit
male diameter	71	mm
slat angle	45	°
slat thickness	2.4	mm
flange width	20	mm
central reinforcement	yes

📦 Model #890

1 object(s)

- format STL

U-shaped handle STL 3D file 35×140×20 mm (Center-to-center 120 mm)

Download this STL 3D model of a U-shaped drawer handle. The external dimensions are 35×140×20 mm. This handle features a square cross-section combined with a straight transition. A fillet along the edges produces a softer grip. The openings are 5 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)	0
fillet radius	1	mm
hole diameter	5	mm

📦 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...

📦 Model #3866

1 object(s)

- format STL

Round air vent STL file ∅ 120 mm, slat angle: 50° with central reinforcement

3D design of a round vent cover for ventilation in STL format. Its male diameter is 120 mm. The slats have a steep angle of 50° and a low thickness of 1.4 mm. A central reinforcement secures the whole structure. This ventilation grille has a prominent flange of 13 mm. The overall diameter of this model is 146 mm.

Parameter	Value	Unit
male diameter	120	mm
slat angle	50	°
slat thickness	1.4	mm
flange width	13	mm
central reinforcement	yes

📦 Model #3677

1 object(s)

- format STL

Angle bracket 200×100 mm STL 3D file, thickness 12 mm, hole diameter 6 mm

File of a support bracket with a central reinforcement in STL format. The dimensions are 200 mm in length, 100 mm in height, 14 mm in width, and 12 mm in thickness. The drill holes have a diameter of 6 mm. Chamfers are applied to the holes for a cleaner fit of the screws. The reinforcing bar enhances mechanical strength and provides two passages for fastening. No support is needed to print this bracket, printed flat on the build plate.

Parameter	Value	Unit
length	200	mm
height	100	mm
width	14	mm
thickness	12	mm
hole diameter	6	mm
chamfer on the holes	yes

📦 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 #3443

1 object(s)

- format STL

Protective grid STL file, center-to-center: 150x150mm, mesh: 6mm - Ø5mm

Download this square honeycomb grid file in STL format. Mounting holes are placed at the four corners (center-to-center 150x150 mm), each with a diameter of Ø5 mm. The overall dimensions reach 160x160 mm, with open 6 mm cell size to maximize airflow. This grid functions as both a mechanical guard and a ventilation panel.

Parameter	Value	Unit
length or center-to-center	150	mm
width or center-to-center	150	mm
mesh size	6	mm
dual color	no
holes	yes
hole diameter	5	mm

📦 Model #3530

2 object(s)

- format STL

Enclosure with screw-mounted lid STL 3D file: 88×42×40 mm (with ventilation on the lid and under the enclosure)

Download this enclosure model with lid in STL format. The dimensions are 88 mm long by 42 mm wide and 40 mm high. The cover is 10 mm high. Wall thickness is 2 mm. This enclosure has significant cooling area on the lid and under the base.

Parameter	Value	Unit
length	88	mm
width	42	mm
total height	40	mm
lid height	10	mm
wall thickness	2	mm
screw margin	0.2	mm
fit clearance	0.2	mm
cooling level	7
cooling zone(s)	cutouts on b...

📦 Model #2062

1 object(s)

- format STL

Round air vent STL file ∅ 92 mm, slat angle: 30° with central reinforcement

Model of a round grille for air circulation in STL format. Its male diameter measures 92 mm. The slats have a slight angle of 30° and a low thickness of 1.4 mm. A central reinforcement reinforces the whole structure. This 3D vent grille has a thin flange of 5 mm. The full diameter of this model is 102 mm.

Parameter	Value	Unit
male diameter	92	mm
slat angle	30	°
slat thickness	1.4	mm
flange width	5	mm
central reinforcement	yes

📦 Model #953

1 object(s)

- format STL

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 #2406

2 object(s)

- format STL

Small parts organizer with 12 drawers 40×80×50 mm STL 3D file, thickness: 2 mm

Download this 3D model of a DIY organizer in STL format. This model contains 12 boxes, arranged in 3 rows and 4 columns. In detail, this means 3 rows of 4 boxes. Each box has usable dimensions of 40 mm wide, 80 mm high, and 50 mm deep. The wall thickness is 2 mm. The global dimensions of the structure measure 188 x 255.5 x 56 mm. All the objects in this model were designed to be printed without support.

Parameter	Value	Unit
number of rows	3
number of columns	4
inner drawer depth	50	mm
inner drawer width	40	mm
inner drawer height	80	mm
wall thickness	2	mm
removable divider	none

📦 Model #3954

2 object(s)

- format STL

Small parts organizer with 6 drawers 20×93×68 mm STL file, thickness: 2 mm

3D model of a storage organizer in 3D STL format. This model features 6 boxes, arranged in 1 rows and 6 columns. In detail, this means 1 rows of 6 boxes. Each box provides an inside space of 20 mm wide, 93 mm high, and 68 mm deep. The wall thickness is 2 mm. The total size of the structure are 161 x 99.5 x 74 mm. All the objects in this model are intended to be printable without support.

Parameter	Value	Unit
number of rows	1
number of columns	6
inner drawer depth	68	mm
inner drawer width	20	mm
inner drawer height	93	mm
wall thickness	2	mm
removable divider	none

📦 Model #3806

2 object(s)

- format STL

Enclosure with screw-mounted lid STL 3D file: 100×100×50 mm

Download this enclosure with screwed lid in STL format. The dimensions are 100 mm long by 100 mm wide and 50 mm high. The lid measures 10 mm high. Side thickness is 4 mm. The enclosure does not have cooling.

Parameter	Value	Unit
length	100	mm
width	100	mm
total height	50	mm
lid height	10	mm
wall thickness	4	mm
screw margin	0	mm
fit clearance	0.1	mm
cooling zone(s)	no cutouts

📦 Model #1288

1 object(s)

- format STL

Tube adapter STL 3D file ⌀ 149–100 mm (Length: 200 mm)

Diameter adapter ⌀149 mm to ⌀100 mm in STL format. Final length of this fitting is 200 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 50 mm, the smaller one of 100 mm. The ends have a fillet on the outside.

Parameter	Value	Unit
side A length	50	mm
side A outer diameter	149	mm
side A thickness	2	mm
side B length	100	mm
side B outer diameter	100	mm
side B thickness	2	mm
transition length	50	mm
axis offset	0	mm
ends fillet	fillet on th...

📦 Model #3629

1 object(s)

- format STL

O-ring STL file ID 16 × CS 5 mm

3D model in STL format of circular seal with dimensions Inner diameter (ID) 16 mm by section thickness 5 mm. Outer diameter (OD, for outer diameter) resulting is 26 mm.

Parameter	Value	Unit
inner diameter (ID)	16	mm
cross section (CS)	5	mm

📦 Model #4007

1 object(s)

- format STL

Box STL file with dimensions 100×100×100 mm

This box design includes a single cavity measuring 100×100×100mm. External size are 104×104×102mm. A 20mm fillet improves usability inside the compartment.

Parameter	Value	Unit
number of rows	1
number of columns	1
compartment length	100	mm
compartment width	100	mm
compartment height	100	mm
wall thickness	2	mm
compartment fillet (radius)	20	mm

📦 Model #3460

1 object(s)

- format STL

Tubing adapter STL file ⌀ 65–57 mm (Length: 90 mm)

Tube junction ⌀65 mm to ⌀57 mm in STL format. Total length of this connector is 90 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 45 mm, the smaller one of 30 mm. The ends have no fillet.

Parameter	Value	Unit
side A length	45	mm
side A outer diameter	65	mm
side A thickness	3	mm
side B length	30	mm
side B outer diameter	57	mm
side B thickness	3	mm
transition length	15	mm
axis offset	0	mm
ends fillet	no fillet

📦 Model #2264

2 object(s)

- format STL

Enclosure with screw-mounted lid STL file: 77×77×300 mm

Enclosure with lid in 3D STL format. The dimensions are 77 mm long by 77 mm wide and 300 mm high. The lid is 60 mm high. Wall thickness is 3 mm. The enclosure does not feature cooling.

Parameter	Value	Unit
length	77	mm
width	77	mm
total height	300	mm
lid height	60	mm
wall thickness	3	mm
screw margin	0	mm
fit clearance	0.1	mm
cooling zone(s)	no cutouts

📦 Model #4062

1 object(s)

- format STL

Tube adapter STL 3D file ⌀ 54–53 mm (Length: 85 mm)

Inline tube junction ⌀54 mm to ⌀53 mm in STL 3D format. Length of this sleeve is 85 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 54 mm, the smaller one of 26 mm. The ends are raw.

Parameter	Value	Unit
side A length	54	mm
side A outer diameter	54	mm
side A thickness	2	mm
side B length	26	mm
side B outer diameter	53	mm
side B thickness	2	mm
transition length	5	mm
axis offset	0	mm
ends fillet	no fillet

📦 Model #823

1 object(s)

- format STL

U-shaped handle STL 3D file 35×100×14 mm (Center-to-center 86 mm)

Download this STL model of a basic U-shaped handle. The overall dimensions are 35×100×14 mm. The handle has a square section and a softened transition. A fillet along the edges ensures a more comfortable grip. The openings are 4 mm diameter and have a 86 mm center-to-center distance.

Parameter	Value	Unit
width	35	mm
length	100	mm
thickness	14	mm
shape (0:square,1:circle)	0
transition (0:right,1:rounded)	1
fillet radius	1	mm
hole diameter	4	mm

📦 Model #4024

2 object(s)

- format STL

Round box with lid STL file ⌀ 30 mm - Height: 155 mm, Shell: 2 mm

Get this round storage box in 3D STL format. Its diameter is 30 mm and its total height is 155 mm. The wall width is 2 mm.

Parameter	Value	Unit
external diameter	30	mm
total height	155	mm
wall thickness	2	mm
fit clearance	0.1	mm
inner bottom fillet	0	mm

📦 Model #4082

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter STL file ⌀50 mm to 72×32 mm, thickness 2 mm

3D model in STL format of a round-to-rectangular adapter with an outer diameter of ⌀50 mm and a rectangular section with internal dimensions 72×32 mm. The wall thickness is 2 mm and the overall length is 50 mm.

Parameter	Value	Unit
cylinder outer diameter	50	mm
cylinder inlet length	10	mm
rectangle internal length	72	mm
rectangle internal height	32	mm
rectangle inlet length	10	mm
offset Z	0	mm
offset Y	0	mm
total length	50	mm
thickness	2	mm
chamfer	no chamfer

📦 Model #3838

1 object(s)

- format STL

O-ring STL file ID 17 × CS 3 mm

3D file of O-ring (torus-shaped seal) with dimensions Inner diameter 17 mm by section thickness 3 mm. External diameter (OD) is 23 mm.

Parameter	Value	Unit
inner diameter (ID)	17	mm
cross section (CS)	3	mm

📦 Model #2181

2 object(s)

- format STL

Round box with lid STL 3D file ⌀ 20 mm - Height: 100 mm, Shell: 2 mm

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 #1005

1 object(s)

- format STL

U-shaped handle STL 3D file 50×140×20 mm (Center-to-center 120 mm)

Download this STL file of a U-shaped furniture handle. The overall dimensions are 50×140×20 mm. The handle features a square profile combined with a softened transition. A light fillet produces a softer grip. The bores are 6 mm diameter with a center-to-center distance of 120 mm.

Parameter	Value	Unit
width	50	mm
length	140	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 #3940

1 object(s)

- format STL

Honeycomb grille STL file, center-to-center: 112x72mm, mesh: 10mm - Ø4mm

3D rectangular honeycomb grid file in STL format. Mounting holes are placed at the four corners (center-to-center 112x72 mm), each with a diameter of Ø4 mm. The overall dimensions reach 120x80 mm, with extra wide 10 mm cell size for peak ventilation. This type of grid provides mechanical protection and ventilation.

Parameter	Value	Unit
length or center-to-center	112	mm
width or center-to-center	72	mm
mesh size	10	mm
dual color	no
holes	yes
hole diameter	4	mm

📦 Model #898

1 object(s)

- format STL

U-shaped handle STL 3D file 35×140×20 mm (Center-to-center 120 mm)

Download this STL file of a U-shaped drawer handle. The overall dimensions are 35×140×20 mm. The handle features a round section and a right-angled transition. The bores are 4 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)	1
transition (0:right,1:rounded)	0
fillet radius	0	mm
hole diameter	4	mm

📦 Model #3514

1 object(s)

- format STL

Container STL 3D file, inner: base Ø70 mm, top Ø70 mm, height 156 mm - wall thickness 4 mm

3D file of a bowl in STL format. This model can be used for sorting small parts in a workshop or on a desk. The sides are straight, providing a constant inner volume, with a inner height of 156 mm and an identical inner diameter at the top and bottom of 70 mm. The wall is particularly thick. The bowl height is 160 mm.

Parameter	Value	Unit
inner bottom diameter	70	mm
inner top diameter	70	mm
inner height	156	mm
wall thickness	4	mm

📦 Model #3947

1 object(s)

- format STL

Tube clip Ø29 mm STL file · Flat head screw Ø4 mm

3D model of a Ø29 mm clip-on pipe support in STL format. The installation is designed by means of a flat head screw Ø4 mm. This snap-on pipe clip is designed for a firm hold with easy setup.

Parameter	Value	Unit
tube diameter	29	mm
hole diameter	4	mm
countersunk screw	yes

📦 Model #1403

1 object(s)

- format STL

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

File of an elbow with a 90° angle in STL format. This elbow features an external diameter of 28 mm and an internal diameter of 26 mm. The tube thickness is therefore 1 mm.

Parameter	Value	Unit
outer diameter	28	mm
inner diameter	26	mm
angle	90	°
end fillets	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.