An adapter for the Sunlu plastic 196mm diameter filament spools. I use these for the AMS because I sometimes experience an issue with filament withdrawal mostly with Sunlu brand. These enlarge the spool diameter to 200mm and the roller contact edge to 4.8mm. Printed with PLA works well. I tested with 4 colors and they worked great. You can test with https://makerworld.com/en/models/32910#profileId-29571