Print me and sandwich me in between spools, pile the spools up! One sided bearing - dual shaft made for spool's exact diameter. Printed in one piece and works for every spool :) It might take some time printing depending on your printer, quality is not 100% for free :( But StackMe deserves to be in your showroom! Recommended print layer height: 0.1 mmJust print as neat as you can. I set the printer speed to 80 mm/s and resolution to 0.1 mm layer height. Printed in PLA, probably will look nicer than in ABS, but ABS will be more resistant and you can stack more and more spools!!!