120B28 Sprocket With Stock Bore 100B21 Sprockets providing a universal fit for

providing a universal fit for standard size 10 gearboxes with 5:1

This 10B35 sprocket is a durable

This 120BTB16 sprocket is a durable

Pitch Diameter: 33

120B28 Sprocket With Stock Bore 100B21 Sprockets providing a universal fit forThis 120B28 sprocket is a durable, high quality, and precision sprocket with 28 hardened teeth. Sprockets that have hardened teeth last longer and are much more durable than those that don't. Something else that is notable about this 120B28 sprocket is that it fully meets all ANSI Standards, which insures proper contact between the #120 roller chain and sprocket thus preventing premature wear or breakage. This sprocket is also fully black oxide coated