Empty Reusable Filament Spool for 1.75mm / 1kg Various Brands

Sunlu Gen 3 (latest) - Empty Reusable Filament Spool for 1.75mm / 1kg

Sunlu Empty Reusable Filament Spool - for 1.75mm / 1kg - Dark Grey/Blue

Sunlu Empty Reusable Filament Spool 1.75mm / 1kg Rolls Bambu Refill Compatible

Empty Bambu Labs Reusable Filament Spools

Empty Reusable Filament Spool for 1.75mm / 1kg

Sunlu Empty Reusable Filament Spool for 1.75mm / 1kg

Sunlu Empty Reusable Filament Spool for 1.75mm / 1kg, 3rd Gen