Filament Spool Rack

Simply print 2x Bottom and 2x Top and insert rods. Diameter of the holes is 28.1mm, but mine is printed in ASA and therefore the rods with a diameter of 27.8mm fit perfectly (about 1% ASA shrinkage). I used old curtain rods made of wood. 4x 95cm and 4x 35cm (although 30cm would also be ok). Everything is plugged in, no glue required.

Easily holds over 25 spools of filament. 

Printed with 3 walls/top/bottom and 15% gyroid infill in Prusament ASA. Maybe print the small test part first and check if it fits your rods. Should work with other filaments, too.