Filament holder for DIN rail

You need 2 x 8mm steel rod, 4x 608zz bearing (per spool), 2x din rail and M3 8mm screws.
Assembly is very simple
Body 1 is screwed to the din rail, a steel rod is inserted into it, and body 2 is screwed to the top.
Bearings are inserted into the roller and the end cup is covered.