Sprocket, Industry Chain Size 40, Industry Chain Pitch 1/2 in, Number of Teeth - Sprockets 34, Plain Bore, Bore Dia. - Sprockets 3/4 in, Outside Dia. 5.7 in, Single Number of Chain Rows, Material - Sprockets Carbon Steel, Max. Bore - Sprockets 2 1/4 in, Pitch Dia. 5.419 in, Type B, Length through Bore 1.0 in, Hub Dia. 2.5 in