Hooks and spool guide to hold large filament spools. Fits the Ikea IVAR corner stands. Several heights included but really the highest one is needed to safely hold large spools. Different versions cater to slightly different hole locations on the stands.
Printed with PETG and a lot (8 ?) of perimeters for strength. The spool guide may wobble at high print speeds, surprisingly the print seems fine afterwards.
The author hasn't provided the model origin yet.