Spool roller with filament sensor

This is a roller made for my Creality CR10 but can be fit on every printer with a top 2020 profile
Materials needed:
- 4x 5x11x5 bearings
- 4x M5x25 screws (length of the screw is not important, but should be long enough to hold the rollers)
- 4x M5 Hex Nuts
- 2x M4x10 screws
- 2x T-nuts to fix on the 2020 profile

There is a washer on the printed parts, it's needed to distance the rollers from the roller holder, depends on your machine tolerances you have to redimension the height of that washers before printing them.