Simple Filament Spool Holder For 1kg Spool (and smaller)

I needed a filament spool holder which mounts to the wall so I designed this. It attaches to the wall using two screws on the inside, which are than hidden by a cap, which is simply pushed in and holds due to friction. The holes are spaced 20mm apart. It holds standard 1kg spools with a width up to 80mm.