One Brand New Aftermarket Replacement 4 Piece Seat Cushion SetFits John Deere Models:Fits JD Crawler Tractors: 350, 450, 350B, 450B Fits JD Crawler Bulldozers: 350C, 450CTechnical Info:Seat Cushion is 21″ Wide and 16 1/4″ Deep. The Backrest is curved and approx. 13″ Tall and has 4 Bolts on the back. The Armrest are approx. 14 1/8″, 4 Bolts on the back side with cutout for Seat back.Backrest: 22″ Wide (widest part at the back)RH LH Armrests: 6.25″ Wide (at narrow end)RH LH Armrests: 8″ Wide (at wide end)