Filament Spool Holder - Stackable

Do you have problems storing your many filament spools, as did I? Try this filament spool holder.FeaturesDesigned to work with standard 20 mm aluminium extrusionsInfinitely stackable (accepts standard 20 cm diameter spools)It can be printed with any materialNo supports requiredAdditional hardware required2x standard 20 mm size aluminium extruded profile per holder (length varies, see below)You can usually get them with M6 threaded ends already4x M6 screw (min 10 mm long) per holderAlternatively, you can glue the profiles in the end caps with 2-part epoxy or similarI do not recommend glueing if you plan to stack the holders4x M6 washer (optional)16x M4 screw (min 14 mm long) per holder for stacking one holder on top of another16x M4 nut per holder for stacking32x M4 washer per holder for stacking (optional, try to use them on the nut sides at least)The end caps are designed to work with standard 20 mm aluminium profiles. The length depends on how many spools you want to store. The caps