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Tube adapter ⌀ 16–12 mm (Length: 35 mm)

Round to Rectangular Adapter ⌀60 mm to 60×30 mm, thickness 2 mm + offset

Color-coded compartment box: 16 compartments of 20×15×5 mm

Multi-compartment box: 3 compartments of 45×45×45 mm

Multi-compartment box: 36 compartments of 17×17×80 mm

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

Round to Rectangular Adapter ⌀125 mm to 200×60 mm, thickness 3 mm + offset

Pipe elbow 180° ⌀OD: 18 mm ⌀ID: 16 mm thickness: 1 mm

Round air vent ∅ 70 mm, slat angle: 45° with central reinforcement

Round-to-Rectangular Tube Adapter ⌀80 mm to 80×80 mm, thickness 3 mm

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Featured Model

Enclosure with screw-mounted lid: 200×130×60 mm (with ventilation on the lid and under the enclosure) 📦 #1247

2 object(s) - format STL

Latest model generated online:

Tube adapter ⌀ 128–98 mm (Length: 71 mm) 📦 #1846

1 object(s) - format STL

From the blog

More than just a 3d file dump

2025-08-24 · features · sylvain

More than just a simple accumulation of 3D files, iteration3d.fr changes the game !

The platform stands out with a unique approach : a structured library of 3D models, designed to help you find the exact model you need quickly and precisely.

Thanks to its multi-criteria search engines integrated into each template, refine your searches based on one or several parameters, give more weight to the ones that matter most, and get results sorted by relevance.

The result cards highlight exact matches and visually guide you to the ideal model, without wasting time.

One step further towards powerful and intuitive tools to unlock the full potential of your 3D projects.

Read the article

A selection of custom 3D models

📦 Model #981

1 object(s)

- format STL

U-shaped handle 50×140×14 mm (Center-to-center 126 mm)

Download this 3D model of a basic U-shaped handle. The external dimensions are 50×140×14 mm. This handle has a square section and a right-angled transition. A light fillet produces a more comfortable grip. The openings are 6 mm diameter and have a 126 mm center-to-center distance.

Parameter	Value	Unit
width	50	mm
length	140	mm
thickness	14	mm
shape (0:square,1:circle)	0
transition (0:right,1:rounded)	0
fillet radius	1	mm
hole diameter	6	mm

📦 Model #1545

1 object(s)

- format STL

Multi-compartment box: 50 compartments of 15×30×15 mm

This 3D model in STL format includes 50 sections measuring 15×30×15mm each. Overall dimensions of the box are 172×162×17mm. The slots do not feature any fillet.

Parameter	Value	Unit
number of rows	5
number of columns	10
compartment length	15	mm
compartment width	30	mm
compartment height	15	mm
wall thickness	2	mm
compartment fillet (radius)	0	mm

📦 Model #1672

1 object(s)

- format STL

Box with dimensions 100×45×65 mm

This STL 3D model features a single compartment measuring 100×45×65mm. The total dimensions are 108×53×69mm. A 3mm fillet helps with item retrieval inside the box. The walls are particularly thick.

Parameter	Value	Unit
number of rows	1
number of columns	1
compartment length	100	mm
compartment width	45	mm
compartment height	65	mm
wall thickness	4	mm
compartment fillet (radius)	3	mm

📦 Model #1697

1 object(s)

- format STL

Washer / Flat Gasket ⌀ID: 30 mm ⌀OD: 40 mm thickness: 4 mm + fillet

Download this 3D file of washer / gasket in STL file format. This part has an inner diameter of ⌀30 mm and an outer diameter of ⌀40 mm. The thickness is 4 mm. A fillet is applied on the outer diameter with a value of 1 mm.

Parameter	Value	Unit
inner diameter	30	mm
outer diameter	40	mm
thickness	4	mm
finish	2
finish position	1
sides	0
finish value	1	mm

📦 Model #859

1 object(s)

- format STL

U-shaped handle 35×140×10 mm (Center-to-center 130 mm)

Download this STL 3D model of a simple U-shaped drawer handle. The external dimensions are 35×140×10 mm. This handle features a square profile combined with a smooth transition. A light fillet along the edges ensures a more pleasant grip. The bores are 4 mm diameter and have a 130 mm center-to-center distance.

Parameter	Value	Unit
width	35	mm
length	140	mm
thickness	10	mm
shape (0:square,1:circle)	0
transition (0:right,1:rounded)	1
fillet radius	1	mm
hole diameter	4	mm

📦 Model #1579

1 object(s)

- format STL

O-ring ID 31 × CS 3.5 mm

STL model of rubber ring with Internal diameter 31 mm × CS 3.5 mm. External diameter (OD) resulting corresponds to 38 mm.

Parameter	Value	Unit
inner diameter (ID)	31	mm
cross section (CS)	3.5	mm

📦 Model #1537

1 object(s)

- format STL

Tube adapter ⌀ 250–100 mm (Length: 80 mm)

Inline tube coupler ⌀250 mm to ⌀100 mm in STL format. Length of this reducer is 80 mm. The thickness of the tubes is identical: 3 mm. The ends are not rounded.

Parameter	Value	Unit
side A length	30	mm
side A outer diameter	250	mm
side A thickness	3	mm
side B length	30	mm
side B outer diameter	100	mm
side B thickness	3	mm
transition length	20	mm
axis offset	0	mm
ends fillet	0

📦 Model #1375

1 object(s)

- format STL

Pipe elbow 37° ⌀OD: 48 mm ⌀ID: 44 mm thickness: 2 mm

3D file of an elbow with a 37° angle in STL format. This elbow has an external diameter of 48 mm and an internal diameter of 44 mm. This results in a tube thickness of 2 mm. End fillets make it easier to insert.

Parameter	Value	Unit
outer diameter	48	mm
inner diameter	44	mm
angle	37	°
end fillets	1

📦 Model #902

1 object(s)

- format STL

U-shaped handle 35×140×20 mm (Center-to-center 120 mm)

Download this 3D file of a simple U-shaped handle. The external dimensions are 35×140×20 mm. This handle has a round profile and a softened transition. The bores 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)	1
transition (0:right,1:rounded)	1
fillet radius	0	mm
hole diameter	5	mm

📦 Model #1551

1 object(s)

- format STL

Tube adapter ⌀ 111–100 mm (Length: 180 mm)

Inline tube reducer ⌀111 mm to ⌀100 mm in STL format. Length of this coupler is 180 mm. The thickness of the tubes is identical: 5 mm. The ends have a fillet on the outside to make tube connection easier.

Parameter	Value	Unit
side A length	80	mm
side A outer diameter	111	mm
side A thickness	5	mm
side B length	80	mm
side B outer diameter	100	mm
side B thickness	5	mm
transition length	20	mm
axis offset	0	mm
ends fillet	1

📦 Model #1473

1 object(s)

- format STL

Round air vent ∅ 100 mm, slat angle: 40°

Design of a round vent cover for air circulation in STL format. Its insertion diameter measures 100 mm. The slats have an angle of 40° and a low thickness of 1.4 mm. This ventilation grille features a flange of 10 mm.

Parameter	Value	Unit
male diameter	100	mm
slat angle	40	°
slat thickness	1.4	mm
flange width	10	mm
central reinforcement	0

📦 Model #977

1 object(s)

- format STL

U-shaped handle 50×140×14 mm (Center-to-center 126 mm)

Download this STL 3D file of a U-shaped handle. The overall dimensions are 50×140×14 mm. The handle features a square profile combined with a straight transition. The bores are 5 mm diameter with a center-to-center distance of 126 mm.

Parameter	Value	Unit
width	50	mm
length	140	mm
thickness	14	mm
shape (0:square,1:circle)	0
transition (0:right,1:rounded)	0
fillet radius	0	mm
hole diameter	5	mm

📦 Model #1474

1 object(s)

- format STL

Round to Rectangular Adapter ⌀80 mm to 60×30 mm, thickness 3 mm

Download this file in STL format of a round-to-rectangular adapter with an external diameter of ⌀80 mm and a rectangular section with internal dimensions 60×30 mm. The wall thickness is 3 mm and the overall length is 90 mm.

Parameter	Value	Unit
cylinder outer diameter	80	mm
cylinder inlet length	30	mm
rectangle internal length	60	mm
rectangle internal height	30	mm
rectangle inlet length	40	mm
offset Z	0	mm
offset Y	0	mm
total length	90	mm
thickness	3	mm
chamfer	0

📦 Model #979

1 object(s)

- format STL

U-shaped handle 50×140×14 mm (Center-to-center 126 mm)

Download this STL model of a basic U-shaped handle. The external dimensions are 50×140×14 mm. This handle has a square cross-section combined with a 90-degree transition. A light fillet along the edges allows for a more comfortable grip. The bores are 4 mm diameter with a center-to-center distance of 126 mm.

Parameter	Value	Unit
width	50	mm
length	140	mm
thickness	14	mm
shape (0:square,1:circle)	0
transition (0:right,1:rounded)	0
fillet radius	1	mm
hole diameter	4	mm

📦 Model #773

1 object(s)

- format STL

Rectangular prism 100×31×68 mm

A STL 3D model of a box. The overall dimensions are 100×31×68 mm. A small fillet softens all the edges.

Parameter	Value	Unit
length	100	mm
width	31	mm
height	68	mm
fillet radius	2	mm

📦 Model #1355

1 object(s)

- format STL

Pipe elbow 45° ⌀OD: 18 mm ⌀ID: 16 mm thickness: 1 mm

File of an elbow with a 45° angle in STL format. This elbow features an outer diameter of 18 mm and an inner diameter of 16 mm. This results in a tube thickness of 1 mm.

Parameter	Value	Unit
outer diameter	18	mm
inner diameter	16	mm
angle	45	°
end fillets	0

📦 Model #1538

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter ⌀150 mm to 100×50 mm, thickness 3 mm + offset

Download this file in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀150 mm and a rectangular section with inner dimensions 100×50 mm. The wall thickness is 3 mm and the total length is 200 mm. The adapter has an offset of 50 mm along the Z axis. A chamfer is present on the outside of the cylindrical end.

Parameter	Value	Unit
cylinder outer diameter	150	mm
cylinder inlet length	25	mm
rectangle internal length	100	mm
rectangle internal height	50	mm
rectangle inlet length	50	mm
offset Z	50	mm
offset Y	0	mm
total length	200	mm
thickness	3	mm
chamfer	1

📦 Model #969

1 object(s)

- format STL

U-shaped handle 50×140×10 mm (Center-to-center 130 mm)

Download this 3D file of a simple U-shaped furniture handle. The overall dimensions are 50×140×10 mm. The handle has a square profile and a rounded transition. A fillet allows for a better tactile feel. The holes are 6 mm diameter and have a 130 mm center-to-center distance.

Parameter	Value	Unit
width	50	mm
length	140	mm
thickness	10	mm
shape (0:square,1:circle)	0
transition (0:right,1:rounded)	1
fillet radius	1	mm
hole diameter	6	mm

📦 Model #1091

1 object(s)

- format STL

Multi-compartment box: 6 compartments of 50×80×100 mm

This STL 3D model includes 6 storage spaces measuring 50×80×100mm each. Overall dimensions are 166×172×104mm. Fillets of 2mm applied to all compartments make it easier to grasp items stored in the compartments. The walls are particularly reinforced.

Parameter	Value	Unit
number of rows	2
number of columns	3
compartment length	50	mm
compartment width	80	mm
compartment height	100	mm
wall thickness	4	mm
compartment fillet (radius)	2	mm

📦 Model #1502

1 object(s)

- format STL

Round to Rectangular Adapter ⌀125 mm to 60×60 mm, thickness 3 mm

3D file in STL format of a round-to-rectangular adapter with an external diameter of ⌀125 mm and a rectangular section with internal dimensions 60×60 mm. The wall thickness is 3 mm and the total length is 120 mm.

Parameter	Value	Unit
cylinder outer diameter	125	mm
cylinder inlet length	20	mm
rectangle internal length	60	mm
rectangle internal height	60	mm
rectangle inlet length	20	mm
offset Z	0	mm
offset Y	0	mm
total length	120	mm
thickness	3	mm
chamfer	0

📦 Model #833

1 object(s)

- format STL

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

Download this STL 3D model of a U-shaped drawer handle. The external dimensions are 35×100×20 mm. This handle features a square profile combined with a right-angled transition. The openings are 5 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)	0
fillet radius	0	mm
hole diameter	5	mm

📦 Model #811

1 object(s)

- format STL

U-shaped handle 35×100×10 mm (Center-to-center 90 mm)

Download this file of a simple U-shaped drawer handle. The external dimensions are 35×100×10 mm. This handle features a round cross-section combined with a smooth transition. The mounting holes are 4 mm diameter with a center-to-center distance of 90 mm.

Parameter	Value	Unit
width	35	mm
length	100	mm
thickness	10	mm
shape (0:square,1:circle)	1
transition (0:right,1:rounded)	1
fillet radius	0	mm
hole diameter	4	mm

📦 Model #1620

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter ⌀75 mm to 200×20 mm, thickness 3 mm + offset

Download this 3D file in STL format of a round-to-rectangular adapter with an external diameter of ⌀75 mm and a rectangular section with internal dimensions 200×20 mm. The wall thickness is 3 mm and the total length is 200 mm. The adapter has an offset of 60 mm along the Y 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	75	mm
cylinder inlet length	30	mm
rectangle internal length	200	mm
rectangle internal height	20	mm
rectangle inlet length	50	mm
offset Z	0	mm
offset Y	60	mm
total length	200	mm
thickness	3	mm
chamfer	3

📦 Model #995

1 object(s)

- format STL

U-shaped handle 50×140×20 mm (Center-to-center 120 mm)

Download this STL 3D file of a simple U-shaped furniture handle. The external dimensions are 50×140×20 mm. The handle features a square profile and a 90-degree transition. The holes are 5 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)	0
fillet radius	0	mm
hole diameter	5	mm

📦 Model #878

1 object(s)

- format STL

U-shaped handle 35×140×14 mm (Center-to-center 126 mm)

Download this model of a U-shaped handle. The external dimensions are 35×140×14 mm. The handle features a square cross-section combined with a rounded transition. A fillet along the edges allows for a softer grip. The holes are 5 mm diameter with a center-to-center distance of 126 mm.

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	5	mm

📦 Model #1779

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter ⌀100 mm to 180×100.2 mm, thickness 3 mm + offset

Model in STL format of a round-to-rectangular tube adapter with an external diameter of ⌀100 mm and a rectangular section with internal dimensions 180×100.2 mm. The shell thickness is 3 mm and the total length is 240 mm. The adapter has an offset of 60 mm along the Z axis.

Parameter	Value	Unit
cylinder outer diameter	100	mm
cylinder inlet length	50	mm
rectangle internal length	180	mm
rectangle internal height	10...	mm
rectangle inlet length	50	mm
offset Z	60	mm
offset Y	0	mm
total length	240	mm
thickness	3	mm
chamfer	0

📦 Model #1247

2 object(s)

- format STL

Enclosure with screw-mounted lid: 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)	3

📦 Model #1585

2 object(s)

- format STL

Round box with lid ⌀ 44 mm - Height: 20 mm, Shell: 2 mm

Get this cylindrical box model in 3D STL format. Its diameter is 44 mm and its total height is 20 mm. The wall width is 2 mm.

Parameter	Value	Unit
external diameter	44	mm
total height	20	mm
wall thickness	2	mm
fit clearance	1	mm
inner bottom fillet	0	mm

📦 Model #1471

2 object(s)

- format STL

Round box with lid ⌀ 80 mm - Height: 35 mm, Shell: 3 mm

Download this round storage box in 3D STL format. Its diameter is 80 mm and its height is 35 mm. The wall thickness is 3 mm.

Parameter	Value	Unit
external diameter	80	mm
total height	35	mm
wall thickness	3	mm
fit clearance	0.1	mm
inner bottom fillet	0	mm

📦 Model #1520

1 object(s)

- format STL

O-ring ID 32 × CS 8 mm

3D model of O-ring with dimensions Internal diameter (ID) 32 mm × section thickness 8 mm. External diameter (OD) resulting is 48 mm.

Parameter	Value	Unit
inner diameter (ID)	32	mm
cross section (CS)	8	mm