Prusa i3 MK2(s) & MK3 Spool Holder - Frame Mount - Top Loader

608 608 bearing bearing fast replacement filament spool holder frame frame mount hex hex design hexagonal holder honeycomb mark2 mark3 MK2S mk3 Original Prusa i3 MK2 Original Prusa i3 MK3 prusa i3 prusa i3 mk2 prusa i3 mk2s prusa i3 mk3 spool spool roller spool holder tool less mounting toolless top loader toploader