2020, 4020 and 4040 extrusions for design purposes. 4040 is a non-standard design created for more linear stability. These are used by me for design work and are dimensionally accurate to Ender 3 style printers. I print these with 5 walls and 90% infill, giving a nearly solid build. Enjoy.

Print vertically, scale on z axis for longer/shorter extrusions.

Creality

Ender 3

No

No

Depends on purpose.

90-100