The AMS Extrusion Wheel Assembly Pair by TANGBOLIBO is designed for repair and maintenance of the Bambu Lab AMS feeder idler gear. This kit includes metal, nylon plastic, and stainless steel components to ensure durability and compatibility with 1.75mm filament diameter. The black color and unit quantity of 1 make it easy to identify and install the feeder idler gear in your 3D printer setup. Made in China, this unit is a reliable solution for keeping your AMS automated material system running smoothly.