Attribute Value: 32B-1 Chain; 28 Teeth; 1 Row of Teeth; No Hardened Teeth; 481.33MM Outside Dia; 453.72MM Pitch Dia; B-Hub One Side; Rough Bore Mount; 50.8MM Chain Pitch; ISO Roller Chain Type; No Keyway; Steel Material; 133MM Max Bore . Names (Page 1)