1. The set consists of an 18T hardened steel pinion and an extremely strong 56 plastic spur gear.

2. Type Bushed Spur Gear Number of Teeth 36 Hub Diameter (Decimal Inch) 2.5000 Hub Diameter (Inch) 2-1/2 Pitch Diameter (Decimal Inch) 3.0000 Material Steel Face Width (Inch) 3/4 Face Width (Decimal Inch) 0.7500 Pressure Angle 14.5 PSC Code 3020