Creality 3D Printer Parts 5PCS Brass Extruder Wheel 40 Teeth Drive Gear for CR-10.CR-10S,S4,S5,Ender 3,Ender 3 Pro,Ender 3 V2

My step motors cog was worn down and press fit. Ordered a new 40-42 and this set. Completely fixed my issue

correct size and seem to work fine

Great direct replacement. Took seconds to swap out. Those things wear out after a few hundred prints and affect print quality.

Very durable accurate fit works perfectly.

I got this new extruder for my ender 3 max, old one had worn a groove from filament. So far so good. Easy to install, just remove tension spring for access and turn the gear to access grub screws. Print quality had huge improvements.

Good quality