These were designed for the Bambu Labs AMS Lite setup, we found that several of the rolls we have from different manufacturers are too large to fit on the AMS Rollers so we designed these adapters to go inside the rolls snug so the AMS lite can grip the roll correctly. We found that both sides of the Spools were slightly different diameters so one adapter is slightly smaller than the other, they will both fit snug but if you find one side slips in too easily or is fighting to much try switching the sides.

Please feel free to reach out or comment with any questions or concerns, all feedback is welcome.