Attribute Value: 200-2 Chain; 26 Teeth; 2 Rows of Teeth; No Hardened Teeth; 22.09" Outside Dia; 20.74" Pitch Dia; B-Hub One Side; Rough Bore Mount; 2-1/2" Chain Pitch; ANSI Roller Chain Type; No Keyway; Steel Material; 5-3/4" Max Bore . Names (Page 1)