3Dnet.no ø54mm filament spool adapter for Duplicator i3

Filament spool adapters made for the filament delivered by 3Dnet.no. Inner Ø=54 mm, width=64mm. Will ofcourse work with narrower spools and a few mm wider. Effect is lost if Ø is a lot bigger than 54mm.
Makes the filament roll effortless.
Works both ways.