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Multi-compartment box STL 3D file: 36 compartments of 17×17×80 mm

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

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

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

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

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

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

Round-to-Rectangular Tube Adapter STL 3D file ⌀20 mm to 20×20 mm, thickness 2 mm + offset

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

Tube adapter STL file ⌀ 100–60 mm (Length: 70 mm)

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Featured Model

Pipe elbow STL 3D file 90° ⌀OD: 28 mm ⌀ID: 26 mm thickness: 1 mm 📦 #1403

1 object(s) - format STL

Latest model generated online:

Tube clip Ø160 mm STL 3D file · Flat head screw Ø8 mm 📦 #4057

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 #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 #1913

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter STL file ⌀102 mm to 80×9 mm, thickness 5 mm + offset

3D model in STL format of a round-to-rectangular adapter with an outer diameter of ⌀102 mm and a rectangular section with inner dimensions 80×9 mm. The wall thickness is 5 mm and the overall length is 100 mm. The adapter has an offset of 21.5 mm along the Z axis. 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	102	mm
cylinder inlet length	7	mm
rectangle internal length	80	mm
rectangle internal height	9	mm
rectangle inlet length	50	mm
offset Z	21.5	mm
offset Y	0	mm
total length	100	mm
thickness	5	mm
chamfer	chamfers on ...

📦 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 #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

📦 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 #2067

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter STL file ⌀63 mm to 80×80 mm, thickness 3 mm

Download this model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀63 mm and a rectangular section with internal dimensions 80×80 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	63	mm
cylinder inlet length	15	mm
rectangle internal length	80	mm
rectangle internal height	80	mm
rectangle inlet length	15	mm
offset Z	0	mm
offset Y	0	mm
total length	50	mm
thickness	3	mm
chamfer	chamfers on ...

📦 Model #1993

1 object(s)

- format STL

Round air vent STL file ∅ 123 mm, slat angle: 45° with central reinforcement

3D model of a round vent cover for air circulation in STL format. Its male diameter is 123 mm. The slats have an angle of 45° and a high thickness of 2 mm. A central reinforcement reinforces the slats. This aeration grille has a prominent flange of 20 mm. The total diameter of the model is 163 mm.

Parameter	Value	Unit
male diameter	123	mm
slat angle	45	°
slat thickness	2	mm
flange width	20	mm
central reinforcement	yes

📦 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 #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 #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 #964

1 object(s)

- format STL

U-shaped handle STL 3D file 50×140×10 mm (Center-to-center 130 mm)

Download this 3D model of a U-shaped handle. The external dimensions are 50×140×10 mm. This handle has a square cross-section combined with a rounded transition. The holes are 4 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	0	mm
hole diameter	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 #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 #3658

1 object(s)

- format STL

Multi-compartment box STL 3D file: 16 compartments of 50×50×30 mm

This parametric compartment box provides 16 sections measuring 50×50×30mm each. The total dimensions are 210×210×32mm.

Parameter	Value	Unit
number of rows	4
number of columns	4
compartment length	50	mm
compartment width	50	mm
compartment height	30	mm
wall thickness	2	mm
compartment fillet (radius)	1	mm

📦 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 #2346

2 object(s)

- format STL

Small parts organizer with 9 drawers 60×60×80 mm STL file, thickness: 2 mm

File of a DIY organizer in 3D STL format. This model contains 9 compartments, arranged in 3 rows and 3 columns. In detail, this means 3 rows of 3 compartments. Each compartment provides an inside space of 60 mm wide, 60 mm high, and 80 mm deep. The wall thickness is 2 mm. The overall dimensions of the box are 201.5 x 195.5 x 86 mm. All the objects in this model were designed to be printable without support generation.

Parameter	Value	Unit
number of rows	3
number of columns	3
inner drawer depth	80	mm
inner drawer width	60	mm
inner drawer height	60	mm
wall thickness	2	mm
removable divider	none

📦 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 #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 #3675

1 object(s)

- format STL

Tube adapter STL file ⌀ 27–21 mm (Length: 395 mm)

Straight tube coupler ⌀27 mm to ⌀21 mm in STL 3D format. Total length of this sleeve is 395 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a sleeve length of 60 mm, the smaller one of 300 mm. The ends have no fillet.

Parameter	Value	Unit
side A length	60	mm
side A outer diameter	27	mm
side A thickness	2	mm
side B length	300	mm
side B outer diameter	21	mm
side B thickness	2	mm
transition length	35	mm
axis offset	0	mm
ends fillet	no fillet

📦 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 #1475

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter STL file ⌀120 mm to 60×40 mm, thickness 3 mm + offset

File in STL format of a round-to-rectangular adapter with an external diameter of ⌀120 mm and a rectangular section with inner dimensions 60×40 mm. The shell thickness is 3 mm and the overall length is 100 mm. The adapter has an offset of 10 mm along the Y axis and 10 mm along the Z axis. 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	120	mm
cylinder inlet length	30	mm
rectangle internal length	60	mm
rectangle internal height	40	mm
rectangle inlet length	30	mm
offset Z	10	mm
offset Y	10	mm
total length	100	mm
thickness	3	mm
chamfer	chamfers on ...

📦 Model #978

1 object(s)

- format STL

U-shaped handle STL 3D file 50×140×14 mm (Center-to-center 126 mm)

Download this STL 3D model of a basic U-shaped handle. The overall dimensions are 50×140×14 mm. The handle has a square profile and a 90-degree transition. The holes 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	0	mm
hole diameter	6	mm

📦 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 #2054

1 object(s)

- format STL

Round air vent STL 3D file ∅ 71 mm, slat angle: 40° with central reinforcement

Model of a round air vent for ventilation in STL format. Its insertion diameter measures 71 mm. The slats have an angle of 40° and a high thickness of 2.4 mm. A centered vertical reinforcement reinforces the slats. This 3D aeration grille has a thin flange of 4 mm. The full diameter of the model is 79 mm.

Parameter	Value	Unit
male diameter	71	mm
slat angle	40	°
slat thickness	2.4	mm
flange width	4	mm
central reinforcement	yes

📦 Model #1811

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter STL file ⌀20.3 mm to 20×10 mm, thickness 2 mm + offset

Model in STL format of a round-to-rectangular tube adapter with an outer diameter of ⌀20.3 mm and a rectangular section with internal dimensions 20×10 mm. The wall thickness is 2 mm and the total length is 75 mm. The adapter has an offset of 3 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	20.3	mm
cylinder inlet length	25	mm
rectangle internal length	20	mm
rectangle internal height	10	mm
rectangle inlet length	30	mm
offset Z	3	mm
offset Y	0	mm
total length	75	mm
thickness	2	mm
chamfer	chamfers on ...

📦 Model #857

1 object(s)

- format STL

U-shaped handle STL 3D file 35×140×10 mm (Center-to-center 130 mm)

Download this STL 3D file of a U-shaped handle. The overall dimensions are 35×140×10 mm. The handle has a square section combined with a smooth transition. The mounting holes are 5 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	0	mm
hole diameter	5	mm

📦 Model #3687

2 object(s)

- format STL

Enclosure with screw-mounted lid STL 3D file: 50×50×35 mm

Enclosure model with a screwed lid in 3D STL format. The dimensions are 50 mm long by 50 mm wide and 35 mm high. The lid is 10 mm high. Wall thickness is 3 mm. The enclosure does not feature cooling.

Parameter	Value	Unit
length	50	mm
width	50	mm
total height	35	mm
lid height	10	mm
wall thickness	3	mm
screw margin	0	mm
fit clearance	0.1	mm
cooling zone(s)	no cutouts

📦 Model #3684

1 object(s)

- format STL

Tubing adapter STL file ⌀ 250–90 mm (Length: 225 mm)

Straight sleeve ⌀250 mm to ⌀90 mm in STL 3D format. Final length of this sleeve is 225 mm. The larger-diameter tube has a thickness of 20 mm and a sleeve length of 5 mm. The smaller-diameter tube has a thickness of 3 mm and a length of 170 mm. The ends have a fillet on the outside to facilitate the connection of the two tubes.

Parameter	Value	Unit
side A length	5	mm
side A outer diameter	250	mm
side A thickness	20	mm
side B length	170	mm
side B outer diameter	90	mm
side B thickness	3	mm
transition length	50	mm
axis offset	00	mm
ends fillet	fillet on th...

📦 Model #3671

1 object(s)

- format STL

Tubing adapter STL 3D file ⌀ 27–21 mm (Length: 137 mm)

Straight tube adapter ⌀27 mm to ⌀21 mm in STL 3D format. Length of this fitting is 137 mm. The thickness of the tubes is identical: 2 mm. The larger-diameter tube has a length of 31 mm, the smaller one of 71 mm. The ends have no fillet.

Parameter	Value	Unit
side A length	31	mm
side A outer diameter	27	mm
side A thickness	2	mm
side B length	71	mm
side B outer diameter	21	mm
side B thickness	2	mm
transition length	35	mm
axis offset	0	mm
ends fillet	no fillet

📦 Model #2122

1 object(s)

- format STL

Round-to-Rectangular Tube Adapter STL 3D file ⌀126 mm to 30×63.5 mm, thickness 3 mm + offset

3D model in STL format of a round-to-rectangular adapter with an external diameter of ⌀126 mm and a rectangular section with internal dimensions 30×63.5 mm. The wall thickness is 3 mm and the total length is 150 mm. The adapter has an offset of 3 mm along the Y axis and 20.0 mm along the Z axis.

Parameter	Value	Unit
cylinder outer diameter	126	mm
cylinder inlet length	30	mm
rectangle internal length	30	mm
rectangle internal height	63.5	mm
rectangle inlet length	80	mm
offset Z	20.0	mm
offset Y	3	mm
total length	150	mm
thickness	3	mm
chamfer	no chamfer

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.