Attribute Value: 200-2 Chain; 14 Teeth; 2 Rows of Teeth; Hardened Teeth; 12.452" Outside Dia; 11.235" Pitch Dia; B-Hub One Side; Rough Bore Mount; 2-1/2" Chain Pitch; ANSI Roller Chain Type; No Keyway; Steel Material; 5-1/2" Max Bore . Names (Page 1)