DESCRIPTION One new aftermarket D2 replacement part fits Caterpillar 4 piece seat cushion kit (includes seat back, seat bottom and a pair of armrests). Fits early and late model CAT crawler tractors/dozers. PLEASE SEE DIMENSIONS BELOW FOR EACH SEAT CUSHION PIECE: Seat Back Dimensions: 13″ Wide (Top) – Tapered 25″ Wide (Bottom) x 12.5″ High T-Nut Holes: 11″ On Center 7.25″ Top to Bottom Armrest Dimensions: 16.5″ Long x 11.25″ On Center Seat Bottom Holes: 22″ Wide x 17.5″ Deep x 6″ Thick Stud Holes: 19″ On Center 6.5″ Back