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

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

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

Honeycomb grid STL file, center-to-center: 32x32mm, mesh: 4mm - Ø4mm

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

Round-to-Rectangular Tube Adapter STL file ⌀100 mm to 50×50 mm, thickness 2 mm

Enclosure with screw-mounted lid STL 3D file: 80×50×35 mm (with ventilation on the lid)

L-bracket 250×100 mm STL file, thickness 8 mm, hole diameter 6 mm

Enclosure with screw-mounted lid STL file: 90×50×40 mm (with ventilation on the lid)

Tube adapter STL file ⌀ 50–40 mm (Length: 45 mm)

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Featured Model

U-shaped handle STL file 35×140×20 mm (Center-to-center 120 mm) 📦 #892

1 object(s) - format STL

Latest model generated online:

Multi-compartment box STL 3D file: 100 compartments of 75×55×40 mm 📦 #3161

1 object(s) - format STL

From the blog

A template to help you get organized

2025-09-22 · New templates · sylvain

A new template is now available on iteration3d.fr!

Discover the drawer storage organizer generator, perfect for sorting your screws and small parts directly with 3D printing.

Everything is customizable: number of rows and columns, inner drawer dimensions, wall thickness, and even removable dividers to multiply compartments.

The design was made to stay easy to print: rounded corners, vertical handles without support, and the option to choose different colors to improve organization.

Start printing now!

Read the article

A selection of custom 3D models

📦 Model #2390

1 object(s)

- format STL

Round air vent STL 3D file ∅ 115 mm, slat angle: 45°

3D file of a round grille for air circulation in STL format. Its male diameter is 115 mm. The slats have an angle of 45° and a high thickness of 2 mm. This ventilation grille has a collar of 10 mm. The full diameter of this model is 135 mm.

Parameter	Value	Unit
male diameter	115	mm
slat angle	45	°
slat thickness	2	mm
flange width	10	mm
central reinforcement	no

📦 Model #1053

1 object(s)

- format STL

O-ring STL 3D file ID 200 × CS 10 mm

3D model of O-ring with dimensions ID (inner diameter) 200 mm by thickness 10 mm. Outer diameter (OD) resulting is 220 mm.

Parameter	Value	Unit
inner diameter (ID)	200	mm
cross section (CS)	10	mm

📦 Model #1137

2 object(s)

- format STL

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

Download this enclosure with a screwed lid in 3D STL format. The dimensions are 60 mm long by 60 mm wide and 60 mm high. The lid is 30 mm high. Wall thickness is 2 mm. This enclosure features strong cooling area under the base.

Parameter	Value	Unit
length	60	mm
width	60	mm
total height	60	mm
lid height	30	mm
wall thickness	2	mm
screw margin	0.2	mm
fit clearance	0.2	mm
cooling level	10
cooling zone(s)	cutouts on t...

📦 Model #777

1 object(s)

- format STL

Rectangular prism STL file 100×22×77 mm

Download an STL 3D model of a box. Its overall dimensions are 100×22×77 mm. A fillet softens the sides.

Parameter	Value	Unit
length	100	mm
width	22	mm
height	77	mm
fillet radius	1	mm

📦 Model #2982

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter STL file ⌀60 mm to 169×17 mm, thickness 2 mm + offset

Download this model in STL format of a round-to-rectangular adapter with an external diameter of ⌀60 mm and a rectangular section with internal dimensions 169×17 mm. The shell thickness is 2 mm and the overall length is 82.6 mm. The adapter has an offset of 10.2 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	60	mm
cylinder inlet length	20	mm
rectangle internal length	169	mm
rectangle internal height	17	mm
rectangle inlet length	40	mm
offset Z	10.2	mm
offset Y	0	mm
total length	82.6	mm
thickness	2	mm
chamfer	chamfers on ...

📦 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 #2894

1 object(s)

- format STL

Multi-compartment box STL 3D file: 60 compartments of 63.5×6.4×19 mm

This sectioned box design features 60 sections measuring 63.5×6.4×19mm each. The total dimensions of the box are 198.5×170×21mm. Fillets of 3mm applied to all compartments provide a better grip stored in the compartments.

Parameter	Value	Unit
number of rows	20
number of columns	3
compartment length	63.5	mm
compartment width	6.4	mm
compartment height	19	mm
wall thickness	2	mm
compartment fillet (radius)	3	mm

📦 Model #3050

2 object(s)

- format STL

Enclosure with screw-mounted lid STL 3D file: 40×40×20 mm

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 is 10 mm high. Side thickness is 2 mm. The enclosure does not have cooling.

Parameter	Value	Unit
length	40	mm
width	40	mm
total height	20	mm
lid height	10	mm
wall thickness	2	mm
screw margin	0.1	mm
fit clearance	0.1	mm
cooling zone(s)	no cutouts

📦 Model #848

1 object(s)

- format STL

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

Download this STL 3D model of a simple U-shaped drawer handle. The external dimensions are 35×100×20 mm. This handle has a round section combined with a softened transition. The mounting holes are 5 mm diameter with a center-to-center distance of 80 mm.

Parameter	Value	Unit
width	35	mm
length	100	mm
thickness	20	mm
shape (0:square,1:circle)	1
transition (0:right,1:rounded)	1
fillet radius	0	mm
hole diameter	5	mm

📦 Model #2974

1 object(s)

- format STL

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

Download this model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀60 mm and a rectangular section with inner dimensions 65×65 mm. The shell thickness is 2 mm and the overall length is 64 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	60	mm
cylinder inlet length	30	mm
rectangle internal length	65	mm
rectangle internal height	65	mm
rectangle inlet length	5	mm
offset Z	0	mm
offset Y	0	mm
total length	64	mm
thickness	2	mm
chamfer	chamfers on ...

📦 Model #2879

2 object(s)

- format STL

Round box with lid STL 3D file ⌀ 127 mm - Height: 63 mm, Shell: 3 mm

Get this cylindrical box model in STL format. Its diameter is 127 mm and its height is 63 mm. The walls have a thickness of 3 mm.

Parameter	Value	Unit
external diameter	127	mm
total height	63	mm
wall thickness	3	mm
fit clearance	0.1	mm
inner bottom fillet	0	mm

📦 Model #2964

1 object(s)

- format STL

Pipe elbow STL 3D file 1° ⌀OD: 52 mm ⌀ID: 46 mm thickness: 3 mm

3D file of a tubing elbow with a 1° angle in STL format. This elbow has an external diameter of 52 mm and an internal diameter of 46 mm. The tube thickness is therefore 3 mm. The ends feature fillets to make it easier to insert.

Parameter	Value	Unit
outer diameter	52	mm
inner diameter	46	mm
angle	1	°
end fillets	yes

📦 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 #2863

2 object(s)

- format STL

Small parts organizer with 20 drawers 45×25×25 mm STL 3D file, thickness: 2 mm

File of a multi-drawer box in 3D STL format. This model contains 20 drawers, arranged in 5 rows and 4 columns. Specifically, this means 5 rows of 4 drawers. Each drawer offers a storage volume of 45 mm wide, 25 mm high, and 25 mm deep. The wall thickness is 2 mm. The overall dimensions of the structure measure 208 x 149.5 x 31 mm. All the objects in this model were designed to be printed without support.

Parameter	Value	Unit
number of rows	5
number of columns	4
inner drawer depth	25	mm
inner drawer width	45	mm
inner drawer height	25	mm
wall thickness	2	mm
removable divider	none

📦 Model #3045

2 object(s)

- format STL

Round box with lid STL file ⌀ 40 mm - Height: 20 mm, Shell: 4 mm

Get this circular storage box model in 3D STL format. Its diameter is 40 mm and its total height is 20 mm. The walls have a thickness of 4 mm. A fillet located at the bottom of the box makes it easier to grab objects located inside.

Parameter	Value	Unit
external diameter	40	mm
total height	20	mm
wall thickness	4	mm
fit clearance	1	mm
inner bottom fillet	1	mm

📦 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 #2038

2 object(s)

- format STL

Small parts organizer with 16 drawers 40×40×150 mm STL file, thickness: 2 mm

File of a multi-drawer box in 3D STL format. This model contains 16 compartments, arranged in 4 rows and 4 columns. Specifically, this means 4 rows of 4 compartments. Each compartment provides an inside space of 40 mm wide, 40 mm high, and 150 mm deep. The wall thickness is 2 mm. The global dimensions of the box are 188 x 180 x 156 mm. All the objects in this model were designed to be printable without support generation.

Parameter	Value	Unit
number of rows	4
number of columns	4
inner drawer depth	150	mm
inner drawer width	40	mm
inner drawer height	40	mm
wall thickness	2	mm
removable divider	none

📦 Model #2748

1 object(s)

- format STL

Right-angle bracket 200×200 mm STL 3D file, thickness 8 mm, hole diameter 5 mm

Download this 3D file of a corner bracket with a central reinforcement in STL format. The dimensions are 200 mm in length, 200 mm in height, 30 mm in width, and 8 mm in thickness. The screw holes are designed with a diameter of 5 mm. Chamfers are done to the holes to seat the screw heads. The central reinforcement bar enhances mechanical strength and provides two passages for screwdriver access. Support generation is not required for printing this bracket, placed flat directly on the build plate.

Parameter	Value	Unit
length	200	mm
height	200	mm
width	30	mm
thickness	8	mm
hole diameter	5	mm
chamfer on the holes	yes

📦 Model #1209

3 object(s)

- format STL

Color-coded compartment box STL 3D file: 4 compartments of 20×20×20 mm

This STL file for a compartment box with colored collars provides 4 cavities measuring 20×20×20 mm each. The total dimensions of the box are 49×49×23 mm. Fillets of 2 mm applied to each compartment, aid item retrieval from the box.

Parameter	Value	Unit
number of rows	2
number of columns	2
compartment length	20	mm
compartment width	20	mm
compartment height	20	mm
wall thickness	3	mm
compartment fillet (radius)	2	mm
row colors	AB

📦 Model #1359

1 object(s)

- format STL

Tube adapter STL 3D file ⌀ 80–50 mm (Length: 60 mm)

Inline tube reducer ⌀80 mm to ⌀50 mm in STL 3D format. Total length of this connector is 60 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 20 mm, the smaller one of 20 mm as well. The two axes of the tubes are offset by 1 mm. The ends feature an internal fillet to make tube connection easier.

Parameter	Value	Unit
side A length	20	mm
side A outer diameter	80	mm
side A thickness	2	mm
side B length	20	mm
side B outer diameter	50	mm
side B thickness	2	mm
transition length	20	mm
axis offset	1	mm
ends fillet	fillet on th...

📦 Model #2800

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter STL file ⌀65 mm to 47×23 mm, thickness 2 mm

Download this model in STL format of a round-to-rectangular adapter with an external diameter of ⌀65 mm and a rectangular section with inner dimensions 47×23 mm. The wall thickness is 2 mm and the total length is 50 mm.

Parameter	Value	Unit
cylinder outer diameter	65	mm
cylinder inlet length	24	mm
rectangle internal length	47	mm
rectangle internal height	23	mm
rectangle inlet length	5	mm
offset Z	0	mm
offset Y	0	mm
total length	50	mm
thickness	2	mm
chamfer	no chamfer

📦 Model #1150

1 object(s)

- format STL

Multi-compartment box STL file: 60 compartments of 50×30×50 mm

This parametric multi-compartment box provides 60 storage spaces measuring 50×30×50mm each. The total dimensions of the box are 317.5×327.5×52.5mm. Fillets of 4mm applied to all compartments provide a better grip stored in the box.

Parameter	Value	Unit
number of rows	10
number of columns	6
compartment length	50	mm
compartment width	30	mm
compartment height	50	mm
wall thickness	2.5	mm
compartment fillet (radius)	4	mm

📦 Model #2997

1 object(s)

- format STL

Corner bracket 250×250 mm STL file, thickness 10 mm, hole diameter 8 mm

Download this 3D model of a support bracket with a reinforcing bar in STL format. The dimensions are 250 mm in length, 250 mm in height, 30 mm in width, and 10 mm in thickness. The mounting holes have a diameter of 8 mm. Chamfers are done to the holes for a cleaner fit of the screws. The reinforcing bar reduces bending and includes two passages for screwdriver access. This bracket prints without support, placed flat on the build plate.

Parameter	Value	Unit
length	250	mm
height	250	mm
width	30	mm
thickness	10	mm
hole diameter	8	mm
chamfer on the holes	yes

📦 Model #1749

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter STL file ⌀108 mm to 25×76 mm, thickness 3 mm

Download this 3D file in STL format of a round-to-rectangular adapter with an external diameter of ⌀108 mm and a rectangular section with internal dimensions 25×76 mm. The shell thickness is 3 mm and the total length is 78 mm.

Parameter	Value	Unit
cylinder outer diameter	108	mm
cylinder inlet length	26	mm
rectangle internal length	25	mm
rectangle internal height	76	mm
rectangle inlet length	26	mm
offset Z	0	mm
offset Y	0	mm
total length	78	mm
thickness	3	mm
chamfer	no chamfer

📦 Model #3074

2 object(s)

- format STL

Round box with lid STL file ⌀ 170 mm - Height: 25 mm, Shell: 3 mm

Get this circular organizing box in 3D STL format. Its diameter is 170 mm and its height is 25 mm. The wall thickness is 3 mm.

Parameter	Value	Unit
external diameter	170	mm
total height	25	mm
wall thickness	3	mm
fit clearance	0.1	mm
inner bottom fillet	0	mm

📦 Model #2640

1 object(s)

- format STL

Shelf bracket 250×247 mm STL file, thickness 12 mm, hole diameter 5 mm

Model of an angle bracket with a central reinforcement in STL 3D format. The dimensions are 250 mm in length, 247 mm in height, 25 mm in width, and 12 mm in thickness. The drill holes have a diameter of 5 mm. Chamfers are applied to the holes to seat the screw heads. The reinforcing bar improves rigidity and includes two passages for screwdriver access. Support generation is not required for printing this bracket, lying flat on the build plate.

Parameter	Value	Unit
length	250	mm
height	247	mm
width	25	mm
thickness	12	mm
hole diameter	5	mm
chamfer on the holes	yes

📦 Model #1649

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter STL 3D file ⌀110 mm to 220×220 mm, thickness 3 mm + offset

3D model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀110 mm and a rectangular section with inner dimensions 220×220 mm. The wall thickness is 3 mm and the overall length is 120 mm. The adapter has an offset of 20 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	110	mm
cylinder inlet length	30	mm
rectangle internal length	220	mm
rectangle internal height	220	mm
rectangle inlet length	50	mm
offset Z	20	mm
offset Y	0	mm
total length	120	mm
thickness	3	mm
chamfer	chamfers on ...

📦 Model #2950

1 object(s)

- format STL

L-bracket 200×200 mm STL 3D file, thickness 8 mm, hole diameter 6 mm

Download this 3D file of a corner bracket with reinforcement in STL 3D format. The dimensions are 200 mm in length, 200 mm in height, 30 mm in width, and 8 mm in thickness. The screw holes are designed with a diameter of 6 mm. Chamfers are applied to the holes for a cleaner fit of the screws. The central reinforcement bar reduces bending and provides two clearances for fastening. No support is needed to print this bracket, lying flat on the build plate.

Parameter	Value	Unit
length	200	mm
height	200	mm
width	30	mm
thickness	8	mm
hole diameter	6	mm
chamfer on the holes	yes

📦 Model #2889

1 object(s)

- format STL

Washer / Flat Gasket STL file ⌀ID: 147 mm ⌀OD: 150 mm thickness: 1.5 mm

Download this 3D model of flat gasket / washer in STL 3D file format. This part features an inner diameter of ⌀147 mm and an outer diameter of ⌀150 mm. The part thickness is 1.5 mm. There is no finish present.

Parameter	Value	Unit
inner diameter	147	mm
outer diameter	150	mm
thickness	1.5	mm
finish	none

📦 Model #3062

1 object(s)

- format STL

Tubing elbow STL file 90° ⌀OD: 150 mm ⌀ID: 146 mm thickness: 2 mm

File of an elbow with a 90° angle in STL format. This elbow features an outer diameter of 150 mm and an inner diameter of 146 mm. The tube thickness is therefore 2 mm. The ends feature fillets to make it easier to insert.

Parameter	Value	Unit
outer diameter	150	mm
inner diameter	146	mm
angle	90	°
end fillets	yes

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.