Just a support / holder for your filament rolls.
Can support up to 1KG rolls (pictured : 750g and 1Kg). maybe more, did not have any larger rolls to test it.
Assembly is pretty straight forward.
For the main axis :
1x Main Axis
For the support itself :
2x Angle A
2x Angle B
2x Axis support
The wheel on the main axis can/should be glued as inner diameter is slighly (0.5mm) larger than the axis itself, otherwise they might slide (depends on print quality).
The Washer-clip are retention washer, that are inserted on the "axis-side" and "axis-long" once inserted in "Angle A" or "Angle B" to secure them in place (see photo).