Filament spool holder

update 2019/1/24:
The hole sizes was modified slightly.

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Width of this filament holder can be easily changed.
This can hold various sizes of spools (I tried 200mm & 125mm) and was very stable.
The difference of 1 and 1b is the hole size for metal tubes.
The hole of 1 is tight and 1b is loose to make it movable.
　
You need to use
OD6mm x L~100mm x 2 metal tube (stainless steel or something else)
608ZZ x 4 bearing
M4x12 x 4 bolt