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

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

Round-to-Rectangular Tube Adapter STL file ⌀60 mm to 50×10 mm, thickness 2 mm + offset

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

Round air vent STL file ∅ 90 mm, slat angle: 35°

Pot STL file, inner: base Ø40 mm, top Ø40 mm, height 40 mm - wall thickness 2 mm

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

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

Pipe elbow STL file 30° ⌀OD: 60 mm ⌀ID: 58 mm thickness: 1 mm

Multi-compartment box STL 3D file: 6 compartments of 80×20×20 mm

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Featured Model

Enclosure with screw-mounted lid STL 3D file: 110×70×35 mm 📦 #1158

2 object(s) - format STL

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Latest model generated online:

Small parts organizer with 9 drawers 80×80×80 mm STL file, thickness: 2 mm 📦 #2805

2 object(s) - format STL

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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 #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 #2698

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter STL file ⌀125 mm to 220×90 mm, thickness 3 mm + offset

3D file in STL format of a round-to-rectangular adapter with an outer diameter of ⌀125 mm and a rectangular section with inner dimensions 220×90 mm. The wall thickness is 3 mm and the overall length is 200 mm. The adapter has an offset of 60 mm along the Z axis.

Parameter	Value	Unit
cylinder outer diameter	125	mm
cylinder inlet length	30	mm
rectangle internal length	220	mm
rectangle internal height	90	mm
rectangle inlet length	30	mm
offset Z	60	mm
offset Y	0	mm
total length	200	mm
thickness	3	mm
chamfer	no chamfer

📦 Model #2547

2 object(s)

- format STL

Small parts organizer with 8 drawers 80×70×150 mm STL 3D file, thickness: 3 mm

Download this file of a DIY organizer in 3D STL format. This model contains 8 boxes, arranged in 2 rows and 4 columns. Practically speaking, this means 2 rows of 4 boxes. Each box offers a storage volume of 80 mm wide, 70 mm high, and 150 mm deep. The wall thickness is 3 mm, which makes the structure sturdy. The total size of the box come to 361 x 156 x 159 mm. All the objects in this model are intended to be printable without support generation.

Parameter	Value	Unit
number of rows	2
number of columns	4
inner drawer depth	150	mm
inner drawer width	80	mm
inner drawer height	70	mm
wall thickness	3	mm
removable divider	none

📦 Model #2691

2 object(s)

- format STL

Small parts organizer with 12 drawers 45×50×60 mm STL file, thickness: 3 mm

Download this model of a sorting cabinet with drawers in STL format. This model features 12 compartments, arranged in 3 rows and 4 columns. Specifically, this means 3 rows of 4 compartments. Each compartment offers a storage volume of 45 mm wide, 50 mm high, and 60 mm deep. The wall thickness is 3 mm, which makes the structure solid. The external dimensions of the structure come to 221 x 172.5 x 69 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	60	mm
inner drawer width	45	mm
inner drawer height	50	mm
wall thickness	3	mm
removable divider	none

📦 Model #879

1 object(s)

- format STL

U-shaped handle STL 3D file 35×140×14 mm (Center-to-center 126 mm)

Download this 3D file of a U-shaped furniture handle. The overall dimensions are 35×140×14 mm. This handle features a square cross-section and a softened transition. A light fillet ensures a softer grip. The openings are 6 mm diameter and have a 126 mm center-to-center distance.

Parameter	Value	Unit
width	35	mm
length	140	mm
thickness	14	mm
shape (0:square,1:circle)	0
transition (0:right,1:rounded)	1
fillet radius	1	mm
hole diameter	6	mm

📦 Model #2494

1 object(s)

- format STL

Container STL file, inner: base Ø100 mm, top Ø200 mm, height 40 mm - wall thickness 3 mm

Download this file of a pot in STL 3D format. This model can be used for organizing small parts in a workshop or on a desk. The shape is open-shaped, with a inner height of 40 mm, a inner diameter at the top of 200 mm, and a inner diameter at the bottom of 100 mm. The wall is solid. The overall height of the bowl is 43 mm.

Parameter	Value	Unit
inner bottom diameter	100	mm
inner top diameter	200	mm
inner height	40	mm
wall thickness	3	mm

📦 Model #1158

2 object(s)

- format STL

Enclosure with screw-mounted lid STL 3D file: 110×70×35 mm

Download this enclosure with a screwed lid in STL format. The dimensions are 110 mm long by 70 mm wide and 35 mm high. The lid measures 20 mm high. Wall thickness is 4 mm. The enclosure does not have cooling.

Parameter	Value	Unit
length	110	mm
width	70	mm
total height	35	mm
lid height	20	mm
wall thickness	4	mm
screw margin	0	mm
fit clearance	0.1	mm
cooling zone(s)	no cutouts

📦 Model #2689

1 object(s)

- format STL

Tubing elbow STL 3D file 45° ⌀OD: 29 mm ⌀ID: 25 mm thickness: 2 mm

3D file of a pipe elbow with a 45° angle in STL format. This elbow features an outer diameter of 29 mm and an inner diameter of 25 mm. This results in a tube thickness of 2 mm.

Parameter	Value	Unit
outer diameter	29	mm
inner diameter	25	mm
angle	45	°
end fillets	no

📦 Model #2553

1 object(s)

- format STL

Tube adapter STL file ⌀ 39–31 mm (Length: 80 mm)

Tube connector ⌀39 mm to ⌀31 mm in STL format. Length of this adapter 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 40 mm. The ends feature an external fillet.

Parameter	Value	Unit
side A length	20	mm
side A outer diameter	39	mm
side A thickness	2	mm
side B length	40	mm
side B outer diameter	31	mm
side B thickness	2	mm
transition length	20	mm
axis offset	0	mm
ends fillet	fillet on th...

📦 Model #2386

1 object(s)

- format STL

Round air vent STL 3D file ∅ 80 mm, slat angle: 45°

Model of a round grille for air circulation in STL format. Its insertion diameter measures 80 mm. The slats have an angle of 45° and a high thickness of 2 mm. This vent cover has a flange of 10 mm. The full diameter of this model is 100 mm.

Parameter	Value	Unit
male diameter	80	mm
slat angle	45	°
slat thickness	2	mm
flange width	10	mm
central reinforcement	no

📦 Model #2437

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter STL file ⌀78 mm to 128×30 mm, thickness 4 mm

Download this model in STL format of a round-to-rectangular adapter with an external diameter of ⌀78 mm and a rectangular section with internal dimensions 128×30 mm. The shell thickness is 4 mm and the total length is 80 mm.

Parameter	Value	Unit
cylinder outer diameter	78	mm
cylinder inlet length	20	mm
rectangle internal length	128	mm
rectangle internal height	30	mm
rectangle inlet length	20	mm
offset Z	0	mm
offset Y	0	mm
total length	80	mm
thickness	4	mm
chamfer	no chamfer

📦 Model #2670

1 object(s)

- format STL

Tube adapter STL file ⌀ 170–154 mm (Length: 70 mm)

Tube reducer ⌀170 mm to ⌀154 mm in STL format. Length of this connector is 70 mm. The thickness of the tubes is identical: 2.5 mm. The larger-diameter tube has a sleeve length of 30 mm, the smaller one of 30 mm as well. The ends are not rounded.

Parameter	Value	Unit
side A length	30	mm
side A outer diameter	170	mm
side A thickness	2.5	mm
side B length	30	mm
side B outer diameter	154	mm
side B thickness	2.5	mm
transition length	10	mm
axis offset	0	mm
ends fillet	no fillet

📦 Model #1792

2 object(s)

- format STL

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

Download this enclosure model with a screwed lid in 3D STL format. The dimensions are 100 mm long by 50 mm wide and 50 mm high. The cover only measures 10 mm high. Side thickness is 4 mm. The enclosure does not feature cooling.

Parameter	Value	Unit
length	100	mm
width	50	mm
total height	50	mm
lid height	10	mm
wall thickness	4	mm
screw margin	0.2	mm
fit clearance	0.2	mm
cooling zone(s)	no cutouts

📦 Model #2243

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter STL file ⌀110 mm to 119×85 mm, thickness 3 mm

Download this 3D file in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀110 mm and a rectangular section with internal dimensions 119×85 mm. The wall thickness is 3 mm and the overall length is 50 mm. Chamfers are present on the outside of the cylindrical end and on the inside of the rectangular end to ease insertion.

Parameter	Value	Unit
cylinder outer diameter	110	mm
cylinder inlet length	10	mm
rectangle internal length	119	mm
rectangle internal height	85	mm
rectangle inlet length	10	mm
offset Z	0	mm
offset Y	0	mm
total length	50	mm
thickness	3	mm
chamfer	chamfers on ...

📦 Model #2692

1 object(s)

- format STL

Tube elbow STL 3D file 180° ⌀OD: 39 mm ⌀ID: 32 mm thickness: 3.5 mm

Model of a pipe elbow with a 180° angle in STL format. This elbow features an external diameter of 39 mm and an internal diameter of 32 mm. This results in a tube thickness of 3.5 mm.

Parameter	Value	Unit
outer diameter	39	mm
inner diameter	32	mm
angle	180	°
end fillets	no

📦 Model #2542

1 object(s)

- format STL

Tube adapter STL 3D file ⌀ 161–96 mm (Length: 150 mm)

Straight tube fitting ⌀161 mm to ⌀96 mm in STL format. Final length of this reducer is 150 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 25 mm, the smaller one of 25 mm as well. The ends have no fillet.

Parameter	Value	Unit
side A length	25	mm
side A outer diameter	161	mm
side A thickness	2	mm
side B length	25	mm
side B outer diameter	96	mm
side B thickness	2	mm
transition length	100	mm
axis offset	0	mm
ends fillet	no fillet

📦 Model #1980

1 object(s)

- format STL

O-ring STL 3D file ID 13 × CS 3 mm

File of rubber ring with ID 13 mm by thickness 3 mm. Outer diameter (OD) resulting corresponds to 19 mm.

Parameter	Value	Unit
inner diameter (ID)	13	mm
cross section (CS)	3	mm

📦 Model #2673

1 object(s)

- format STL

Tubing elbow STL file 45° ⌀OD: 20 mm ⌀ID: 18 mm thickness: 1 mm

3D model of a pipe elbow with a 45° angle in STL format. This elbow features an external diameter of 20 mm and an internal diameter of 18 mm. The tube thickness is therefore 1 mm. End fillets make it easier to insert.

Parameter	Value	Unit
outer diameter	20	mm
inner diameter	18	mm
angle	45	°
end fillets	yes

📦 Model #2313

1 object(s)

- format STL

Tube adapter STL file ⌀ 77–57 mm (Length: 125 mm)

Inline tube junction ⌀77 mm to ⌀57 mm in STL format. Length of this fitting is 125 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 50 mm, the smaller one of 50 mm as well. The ends have no fillet.

Parameter	Value	Unit
side A length	50	mm
side A outer diameter	77	mm
side A thickness	2	mm
side B length	50	mm
side B outer diameter	57	mm
side B thickness	2	mm
transition length	25	mm
axis offset	0	mm
ends fillet	no fillet

📦 Model #2189

1 object(s)

- format STL

Tube adapter STL 3D file ⌀ 35–30 mm (Length: 55 mm)

Inline tube junction ⌀35 mm to ⌀30 mm in STL format. Total length of this adapter is 55 mm. The thickness of the tubes is identical: 3 mm. The larger-diameter tube has a length of 20 mm, the smaller one of 20 mm as well. The ends feature a fillet to make tube connection easier.

Parameter	Value	Unit
side A length	20	mm
side A outer diameter	35	mm
side A thickness	3	mm
side B length	20	mm
side B outer diameter	30	mm
side B thickness	3	mm
transition length	15	mm
axis offset	0	mm
ends fillet	fillet on bo...

📦 Model #2675

1 object(s)

- format STL

Right-angle bracket 120×120 mm STL 3D file, thickness 6 mm, hole diameter 6 mm

Download this model of a mounting bracket with a reinforcing bar in STL 3D format. The dimensions are 120 mm in length, 120 mm in height, 30 mm in width, and 6 mm in thickness. The drill holes have a diameter of 6 mm. Chamfers are done to the holes for a cleaner fit of the screws. The reinforcing bar improves rigidity and provides two openings for screwdriver access. No support is needed to print this bracket, lying flat on the build plate.

Parameter	Value	Unit
length	120	mm
height	120	mm
width	30	mm
thickness	6	mm
hole diameter	6	mm
chamfer on the holes	yes

📦 Model #2657

1 object(s)

- format STL

Tubing adapter STL file ⌀ 163–154 mm (Length: 100 mm)

Inline tube coupler ⌀163 mm to ⌀154 mm in STL 3D format. Length of this sleeve is 100 mm. The thickness of the tubes is identical: 2.5 mm. The larger-diameter tube has a length of 50 mm, the smaller one of 40 mm. The ends are rounded on the outside to ease the connection.

Parameter	Value	Unit
side A length	50	mm
side A outer diameter	163	mm
side A thickness	2.5	mm
side B length	40	mm
side B outer diameter	154	mm
side B thickness	2.5	mm
transition length	10	mm
axis offset	0	mm
ends fillet	fillet on th...

📦 Model #2682

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter STL file ⌀150 mm to 200×115 mm, thickness 4 mm

3D file in STL format of a round-to-rectangular adapter with an external diameter of ⌀150 mm and a rectangular section with internal dimensions 200×115 mm. The shell thickness is 4 mm and the total length is 200 mm. Chamfers are present on the outside of the cylindrical end and on the inside of the rectangular end to ease insertion.

Parameter	Value	Unit
cylinder outer diameter	150	mm
cylinder inlet length	50	mm
rectangle internal length	200	mm
rectangle internal height	115	mm
rectangle inlet length	50	mm
offset Z	0	mm
offset Y	0	mm
total length	200	mm
thickness	4	mm
chamfer	chamfers on ...

📦 Model #1793

1 object(s)

- format STL

Tube adapter STL file ⌀ 66–41 mm (Length: 90 mm)

Straight tube adapter ⌀66 mm to ⌀41 mm in STL format. Length of this reducer is 90 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 40 mm, the smaller one of 45 mm. The ends have a fillet on the outside to facilitate the connection of the two tubes.

Parameter	Value	Unit
side A length	40	mm
side A outer diameter	66	mm
side A thickness	2	mm
side B length	45	mm
side B outer diameter	41	mm
side B thickness	2	mm
transition length	5	mm
axis offset	0	mm
ends fillet	fillet on th...

📦 Model #2650

3 object(s)

- format STL

Small parts organizer with 9 drawers 60×60×150 mm STL file, thickness: 2 mm

File of a storage organizer in STL format. This model contains 9 drawers, arranged in 3 rows and 3 columns. Specifically, this means 3 rows of 3 drawers. Each drawer provides an inside space of 60 mm wide, 60 mm high, and 150 mm deep. The wall thickness is 2 mm. The drawers come with 2 dividers each, which allows up to 3 sections per drawer and up to 27 compartments in total. The total size of the structure come to 201.5 x 195.5 x 156 mm. All the objects in this model were designed to be printable without support.

Parameter	Value	Unit
number of rows	3
number of columns	3
inner drawer depth	150	mm
inner drawer width	60	mm
inner drawer height	60	mm
wall thickness	2	mm
removable divider	two divider ...

📦 Model #2606

3 object(s)

- format STL

Small parts organizer with 2 drawers 50×45×100 mm STL 3D file, thickness: 2 mm

Download this 3D file of a storage organizer in 3D STL format. This model features 2 boxes, arranged in 1 rows and 2 columns. Practically speaking, this means 1 rows of 2 boxes. Each box measures 50 mm wide, 45 mm high, and 100 mm deep. The wall thickness is 2 mm. The boxes come with 2 dividers each, which allows up to 3 sections per box and up to 6 compartments in total. The external dimensions of the box come to 115 x 51.5 x 106 mm. All the objects in this model were designed to be printed without support.

Parameter	Value	Unit
number of rows	1
number of columns	2
inner drawer depth	100	mm
inner drawer width	50	mm
inner drawer height	45	mm
wall thickness	2	mm
removable divider	two divider ...

📦 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 #2677

1 object(s)

- format STL

O-ring STL file ID 90 × CS 5 mm

3D model of rubber ring with Inner diameter 90 mm by CS (cross section) 5 mm. Outer diameter (OD) resulting corresponds to 100 mm.

Parameter	Value	Unit
inner diameter (ID)	90	mm
cross section (CS)	5	mm

📦 Model #2685

2 object(s)

- format STL

Small parts organizer with 25 drawers 50×50×57 mm STL file, thickness: 3 mm

3D file of a storage box with drawers in 3D STL format. This model includes 25 drawers, arranged in 5 rows and 5 columns. Practically speaking, this means 5 rows of 5 drawers. Each drawer offers a storage volume of 50 mm wide, 50 mm high, and 57 mm deep. The wall thickness is 3 mm, which makes the structure sturdy. The total size of the structure are 300.5 x 285.5 x 66 mm. All the objects in this model were designed to be printable without support.

Parameter	Value	Unit
number of rows	5
number of columns	5
inner drawer depth	57	mm
inner drawer width	50	mm
inner drawer height	50	mm
wall thickness	3	mm
removable divider	none

📦 Model #2664

1 object(s)

- format STL

O-ring STL 3D file ID 25 × CS 10 mm

3D file in STL format of circular seal with dimensions Inner diameter (ID) 25 mm × CS 10 mm. Outer diameter (OD, for outer diameter) is 45 mm.

Parameter	Value	Unit
inner diameter (ID)	25	mm
cross section (CS)	10	mm

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.