This spool ring holder is 30mm in diameter and 70mm long. It has an end designed to keep the rings from falling off the end if you bump them. I printed out of JAYO/SUNLU PLA+ with 3 walls with a 0.4mm. Infill I staggered to make the base that has screw holes have more infil then the rest of the design, but 15% should be perfectly fine all the way thru. Printed on the Bambu Lab X1-Carbon. Mounting holes are M3/3.2mm in size… but I decided to use 3M Scotch Double Sided mounting tape instead of screwing holes into my wood desk. Enjoy!

Included .step .stl and .3mf for convenience.

If you are interested in the rings, you can find them on here and they work awesome, designed for Polymaker PolyLite spools but also work on other cardboard spools with 40-42mm center holes.