Attributes . 25 Chain; 18 Teeth; 1 Row of Teeth; No Hardened Teeth; 1.568" Outside Dia; 1.44" Pitch Dia; B-Hub One Side; Rough Bore Mount; 1/4" Chain Pitch; ANSI Roller Chain Type; No Keyway; Stainless Steel Material; 3/4" Max Bore . Names