Attributes . 25 Chain; 13 Teeth; 1 Row of Teeth; No Hardened Teeth; 1.167" Outside Dia; 1.045" Pitch Dia; B-Hub One Side; Rough Bore Mount; 1/4" Chain Pitch; ANSI Roller Chain Type; No Keyway; Stainless Steel Material; 7/16" Max Bore . Names