Prusa i3 Steel Spool holder

Side spool holder for Prusa i3 Steel.
For spools with 52.5 mm inner diameter.
To mount you need to drill one hole for m4 screw.
To assemble you need:
1 x m8x70 HEX head cap screw
2 x m8 nuts
1 x m8 washer
2 x 608 ball bearings
1 x m4x12 screw
1 x m4 nut