Redrex Dual Gear Extruder Metal Drive Feeder Upgrade Kit for Creality Ender 3 V2 Ender 3 Pro CR10 Series 3D Printer TPU Filament Supported Dual Drive Extruder sold2024 and 1 1 2 inch tall sanding industrial_Aug2024_update and 1 1 2 inch tall sanding drums with a 2 inch diameter May not adhere well to certain types of brick – testing is recommended Issues that this fixes: Miss aligned Extrusion feed gearsExcessive part damage from wearMissing layer extrusionOver and under extrusionBowden tube failureFilament damage and grindingJammed nozlesRetraction errorsMetal fragments enter the hot endSqueeking and rattling noiseLow quality printsBroken filamentHogging of filament Ender 3 V2 Ender 3 Pro Ender 3 Ender 5 Pro Ender 5 Plus CR10 S CR10 V2 CR10 Max CR5 Pro CR5 S CR 3040 Pro Voxelab Aquila Artillery Hornet so the sharp gear will NOT ride against the bottom of the arm or chew it up