Please keep all the screws from your original extruder unit for replacement.
X1E Series Extruder Unit - FAE018
The Hardened Steel Extruder Unit by Bambu Lab, an advanced and durable upgrade designed to enhance your 3D printer's performance. Crafted with meticulous precision from hardened steel, this extruder unit boasts exceptional strength and resistance to wear. Its finely engineered teeth profile ensures optimal filament grip, promoting smooth and consistent feeding for superior printing outcomes.