Locks in the top of the Robo3D printer case, room for two spools. There is a logo version and a no logo version. Made it so my Robo uses less space.
Fits the Robo3D filament spools perfectly.
Update 1: Logo version cleaned up a bit.
Update 2: New version for spools with smaller spindle holes, minimum size 16mm. "spool holder logo 4 small.stl"
Update 3: Added longer spool holder, for those jumbo spools, by request.

Print instructions

Category: 3D Printer Accessories Instructions

Looks good with a .2046 layer height,
http://calculator.josefprusa.cz/