BIQU Extruder Pulley 36Teeth Bore 5mm Stainless Steel Drive Gear for 1.75mm & 3mm 3D Printer Filament (Pack of 5pcs)

Perfect upgrade for extruder gears, used in both direct drive and Bowden configurations and works perfectly and cheaper than most, definitely a win.

Description says 5 extruder gears when I received 4. Probably wont even use 4 but its not the point. Would like to receive what I actually paid for.

Not sure what I was using before, but these saved my printer to now print TPU like gang busters! If you are struggling with printing TPU, these are grippy and work. It may not be your only problem, but it will eliminate a variable for why it may not be working..... (TPU is hard to print). Worth the price and should last a lifetime.

Switched my worn Ender-3 brass extruder gear with this one. Size was so close that I didnt bother with E-step calibration. Working great.

A vast improvement over my stock brass gears. If you are having extruder issues, this is well worth a try to fix the problem. Used on a stock Ender 3 extruder, and I had no need to change e-steps (checked before and after, same result). YMMV, but this fixed my under extrusion.

Works well

Fit perfectly on my creality cr-10 mini. Still waiting to to see the durability.

I bought these to replace the one that came with my Anet A8 extruder and it works great! Way better than the one that came with my printer with less than 24 teeth.

Worked good on my cr-10s

Im only getting about 12 hours of print time before the teeth are too warn to work. I have only used PLA. The stock brass drive gear lasted MUCH longer