Suite Marine uses only the highest marine grade vinyl on their boat seats. Each seat mounts on industry-standard 4-bolt pedestal systems or sliders. Stainless steel mounting hardware is included, allowing an easy mount to an existing pedestal base. Seats feature an ergonomic contoured design. Seat Width: 19.5"Seat Depth: 21.5"Seat Height: 24.5" Seats feature an ergonomic contoured design | Semi-Custom Boat Seat - Dark Grey/Ebony