filament spool holder back wall

This is my spool holder that attaches to the back of the printer. Fittings in three diameters: 48 mm, 53.5 mm and 64 mm.

Threaded rod M6x140 mm,
2 x 626zz bearings,
4 x Screw / washer / nut M3x14mm

Note: In Brazil the dimensions of the spool holder correspond to the companies MOVTECH, 3DLAB e FAZ3D.