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

Collar is ferric stainless, actual spurs are austentic stainless. For those of you who are trying to confirm these are indeed steel via magnetism. These are indeed stainless steel. Just the spurs are austentic stainless (non magnetic) with a higher chromium content than that of the collar. Otherwise the spurs grip filament nicely.

Fit perfect and worked great after e-step calibration on cr-10s.

Super upgrade over the brass ones on the Ender 3

These have been working great as a replacement for the brass gears so far. I really enjoy the upgrade.

Used on my Ender 3 v2 with great success once esteps were calibrated

Always had problems with my ender 3 with under extrusion with certain filament brands at normal temps. Work around was to increase temp which caused stringing or blobs till I found these steel gears for the extruder. Made a difference reminds me of the original ones you find on a wanhao i3. Must buy for Ender 3.

Working well so far. Ran a kilo of carbon fiber through so far without issue. Do wish they had two grub screws instead of just one.

Got these for the ender 3 extruder they work much better than the brass ones that came on it.

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.

Good nuff