This is a snap in spool adapter for Sunlu Spools that have a diameter of 72.5mm or other spools that thave that diameter. It reduces to 53.5mm and fits the AMS Lite pretty stiff and has no problems. Just print the model twice, fit them into the spool and give them a good push and it´s done and you can use it with the AMS Lite. I hope I could help you with that adapter.