Allows Bambu Lab and Kingroon spools to rotate smoothly inside the Eibos Easdry Filament Dryer with little friction, the spools rotate much easier compared to without the adapter as i found my P1S Printer was having issues with not being able to pull the filament out of the Eibos Easdry dryer without removing the ptfe tubing and flexible seal completely. Update 28/12/2023 added a version without the raised edge to allow leaving the spool adapter on the dryer permanently while also making adding and removing filament spools much faster and easier