52mm 428 56T Rear Sprocket Cog 
For 428 Chain Fit 110cc 125cc 140cc PIT PRO PIT Bike Trail Bike Dirt Bike Thumpstar Pitpro Sunl Taotao
Diameter of Centre Hole: around 52cm (520mm)

Diameter of Sprocket / Cog : around 23cm (230mm)

Tooth   :  56 T

Fit Models:

It fits Dirt Bike ATV Quad TaoTao SUNL Honda Chinese.
It may also fit some Honda dirt bikes with 428 chain.
428 chain with 106 links.
It has 1 master link on it.

Package included:
1 x  Front Sprocket 
1 x  Rear Sprocket 
1 x chain