This is a Hot Racing CNC machined anodized aluminum 78T spur gear for the HPI E10.
Number of Teeth: 78
Gear Pitch: 48 pitch
1x Spur Gear with Gear Adopter
Must use with 48 Pitch pinion and HET1801.
Hard Anodizing or Hardcoat is an electrochemically produced gray layer of hard aluminum oxide on the surface of aluminum components.
(stock 42p 22T pinion Gear about to a 48 26t gear)