Spool holder adapter

This is a model with inner radius of 15.25mm and outer radius of 26mm spool holder support.There are who half piece designs, since many spool holders are with a stopper at the end, this design allows to fit without gap. One regular and the other tapered from outer radius of 26mm to 31mm. Second design is for spools between 26mm and 31mm outer radius so once fitted on both ends, will not wobble on the support. Also there are 2 fitting pins to keep them snugly in place, so no other parts needed.If fits, the regular half design can be used only.If needed the second range of diameter, one regular and one tapered one also works fine when combined, to save some filament.