A spool holder for Kossel Mini top attachment. Fits 15x15 openbeam. Adjustable width to fit almost any filament spool size. Please share if you make this :) Print 2x this file. Adjust the width to suit your filament spool by moving one of the holders on your Kossel top beam. Fit 4x ball bearings (608 ZZ) with M8x30mm bolt and M8 nut. Attach to Openbeam with 2x M3x10mm socket head bolt and 2x M3 nut. Attach the bearing on the side without the Kossel text to be able to read it when in use with a spool.