Shortening Shuttle® 01-SS-DWK Double Wheel Kit Economy Series Item Number: 01-SS-DWK This product repairs ALL Shortening Shuttle® Waste Oil Carrier/Economy Series. Request Quote More Information Overview Kit contains: 2 pcs 8" wheels, 2 pcs wheel bolts, 4 pcs WIP-WBWA wheel bolt washers, and 2 pcs 3/8" flange nuts. It fits the SS-611, SS-611-T, SS-611-TL, SS-709, and SS-709-T models.