Robinson Racing Hardened 21T Pinion Gear, 32 Pitch, 1/8 inch Bore. Part number RRP1721. Robinson Racing super hard "Absolute" steel 21T motor pinion gear, 32 pitch, 1/8 inch bore.
Teeth: 21T
Pitch: 32
Bore: 1/8 inch
Material: super hard "Absolute" steel
Check the tooth count, pitch and bore before ordering.