This is a 21 tooth, 48 pitch Hard Anodized aluminum pinion gear from Hot Racing.
6061 Aluminum Construction Short Shank CNC Precision Machined Stamped w/number of teeth for easy identification Beveled teeth edge
One pinion gear One pinion 3mm set screw
Allen wrench or ball driver for mounting.
Teeth count: 21 teeth Teeth pitch: 48 pitch width: 9.7mm (0.38") Inner diameter: 3.2mm (.125")
Can be used in most applications where a 48pitch pinion recommended. Hard Anodizing or Hardcoat is an electrochemically produced grey layer of hard aluminum oxide on the surface of aluminum components.