This Low-back boat seat is made with a high-impact injection plastic frame, Marine Grade UV and Mildew treated vinyl. Marine Grade high compression foam padding. Comes with mounting fasteners to mount to any standard 4-bolt swivel or pedestal. Maximum Weight Capacity 250 lbs. Low-Back boat seat design ideal for fishing, aluminum hinges enable backrest to be flipped down, creating more space. Boat Seat Dimension:Height 20 ” X Width16 ” X Depth15.5 ”