Description New universal replacement tractor seat. 18 in. Wide, 15.25 in. Tall, 19.25 in. Deep. Seat Cushion 3.25 in. Thick. Original Seat Uses M8X16 Mounting Bolts, A&I Seats Uses 5/16"-18 NC Bolts.Dimensions: 18" x 3.25" x 19.25" x 15.25".