Reusable spool

Reusable spool - compatible with GST3D refill filament which have smaller diameter carboard rings than other brands, making most reusable spool useless. Other brands refill fillament also works, tighten the screwthreads to ensure the carboard ring stays in its place.The spool is compatible with the AMS and AMS lite, the chamfered edged of the inner core aid easy installion of the spool unto the AMS lite.Holes in the inner core mean you can also use this reusable spool to manually respool fillament.Also works as an adaptor for GEEETECH spools that are way too big for the AMS Lite.