Tractor Seat Cushion Set Fits International Harvester 140 Fits Cub 100 300 350. One Brand New Replacement. Black Back & Bottom Seat Cushion Set with Wood Base. Fits:Fits Case-Fits International Harvester Models. A, B, Fits Cub, Fits Cub LO-BOY, Fits Cub 154 LO-BOY, SUPER A, 100, 130, 140, 300, 330 (Utility), 350, 460. 6″ Back Cushion: 5.25″ Tall, 20″ x 5.25″ Wooden Back, 16.50″ x 1.375″ Bolt Pattern. Bottom Cushion: 20.5″ x 15″ Cushion, 12.5″ x 7.5″ Bolt Pattern. Replaces Part Number: IH18W, 363219R91.