COMTREE Bamboo Original X1,X1C Hardened Steel Extruder Unitt with Dual Gears for Increased Extrusion Force and Filament Break Detection, Extruder Component Kit for Bambu Lab X1 Series 3D Printer 

["Compatible with Bambu Lab X1/X1C 3D Printer","The hardened steel extruder unit is equipped with double gears made of hardened steel, which provides increased extrusion force, prevents slippage, and enhances abrasion resistance. These gears enable the extruder unit to handle tough engineering filaments such as carbon fiber nylon and glass fiber nylon.","In addition, the extruder unit includes a sensor that supports filament break detection, which can help prevent print failures and improve overall printing efficiency.","In the Box: Hardened Steel Extruder Unit - X1 Series"]