With this slim spool holder you can stack filament spools on top of and beside each other in a tight space. Suitable in for instance a printing cabinet where there isn't an option to wall mount storage for spools.

The holder isn't primarily intended to be a spool roller but rather a way to stack spools vertically on top of each other.

One of the .3mf-files holds everything you need to print 2 holders on one and the same build-plate (25x25cm).

(There is also a .3mf-file with a longer cylinder if you'd still like to use it as a spool roller.)