The MIKA3D spool adapter is designed to work in the AMS unit with MIKA3D 0.5 KG spools. These adapters easily bind together just like Bambu Labs reusable spools for quick installation onto any 0.5 kg MIKA3D spool. They are printed in PLA since the MIKA spools can be dried without the adapter installed. The Side A adapter features geometry that interfaces with the MIKA3D spool that will prevent it from spinning on the adapter, allowing the AMS to drive the adapter and spool. Both sides of the adapters contain my signature filament tie downs that won't bend or kink your filament.