Attribute Value: 32B-1 Chain; 68 Teeth; 1 Row of Teeth; No Hardened Teeth; 1129.284MM Outside Dia; 1099.96MM Pitch Dia; C-Hub Both Sides; Rough Bore Mount; 50.8MM Chain Pitch; ISO Roller Chain Type; No Keyway; Steel Material; 139MM Max Bore . Names (Page 1)