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

Very durable accurate fit works perfectly.

Good quality

Direct replacement. No calibration needed

I had some issues with the filament not feeding properly. This part fixed my issue! It is also great to have some spares!

These fit and works perfectly, just like OEM parts should, will buy again as necessary.

Works very good in my CR-10

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

Works as expected. The teeth on the one that came with the printer finally wore out after continously printing for months on end. Still on the first one in the pack after about a month of it being on the printer. So far so good.

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

Without these i would have given up on 3d printing. After switching between many extruders and gears these are by far the best for making sure there is no gear slippage. Make sure though you have the right extruder or it wont fit.