Chain Sprockets are offered in the soft or hardened condition. The teeth are hobbed, bores and keyways are mentioned to close tolerances to ensure tow PCD run outs. Special profile sprockets are offered for conveyor chain applications. Materials used are steel or stainless steel. Sizes available are as follows: ASA 25, 35, 40, 50, 60, 80, 100, 120, ISO/DIN 04, 05B, 06B, 08B, 10b, 12B, 16B.