this is a filament holder. it fits very well with my prusa i3 hephestos.
it is bolted with 2 m5 screws, andI have used the holes of letter i on the frame.
the bearing are 2 608 8x22x7mm
the diameter of the ros is M8
i have designed 2 plate to link the spool to the rod. the first one is tapered, and the latter is flat and fits with BQ spool.
the paltes needs supports