DESCRIPTION One New Michigan Style Replacement Seat Without Tracks Fits Allis Chalmers: Tractor Models Fits Bobcat: Skid Steer Loader Models Fits Case-IH: Tractor Models Fits Ford and New Holland: Tractor Models Fits John Deere: Tractor Models Fits Kubota: Tractor Models Fits Massey Ferguson: Tractor Models Fits Minneapolis Moline: Tractor Models Fits Yanmar: Tractor Models Technical Information: Without Skid Tracks 18″ wide x 15.25″ high x 19.25″ deep. Seat cushion is 3.25″ thick. The original seat uses M8X16 mounting bolts, the A&I seats use 5/16″-18 NC bolts. Replaces part numbers: N-77508, TM333BL, B1TM333BL, N77508.