HomeAll Products6" 6-RIB ALUM SERPENTINE PULLEY, FOR CAST IRON PUMP: 50217600SKU: 502176006" 6-RIB ALUM SERPENTINE PULLEY, FOR CAST IRON PUMP: 50217600$136.36PriceQuantity*Add to CartAll KRC pulleys are black hard anodized to 62 Rockwell hardness.