Model No: 50, 60, 60-2, 60H, 80, 80H, S52F Specifications:1) Model numbers: 50, 60, 60-2, 60H, 80, 80H, S52F2) Colors available: natural, yellow, blue, gold, black3) Materials: carbon steel, nickel-plated, zinc plated, copper plated Agricultural Roller Chain