This is a Bed Extender for the Ender 3 Belt Printer. Rollers are the same diameter as OEM and close together. Liner is printed in all walls and TPU for a soft exterior. Inner roller doesn't need much infill as it just goes along with no weight applied to it.

Print the following quantities

1-Left Rail
1-Right Rail
5-Inner Roller Core
5-Liners in TPU
10-Shims that go between bearing and rail
10-Bearing Cups
1-Set of Retainers or 10 retainers
1 "Roller and liner combined" if you do not want to do an outer TPU sleeve.

Creality

CR10S PRO

No

No

0.20

Requires (10) 22mmX7mm Bearings with an 8MM center