Reusable Filament Spool

Reusable Filament Spool, Detachable & Easy to Use.Model file 1 "spool standard.3mf" fits standard Creality filament refills (approximately 81mm inner diameter).Model file 2 "spool 77mm & 81mm.3mf" fits both 77mm and 81mm inner diameter filament refills.Do not use PLA printing spools if using them for drying filaments.