Springfield Fixed Height Boat Seat PedestalSpringfield Marine's Fixed Height Pedestal System offers a heavy-duty base and post for today's larger and faster recreational boats. These pedestals feature a 2-7/8" high-strength anodized aluminum post and a AC7A aluminum alloy base with an anodized finish for maximum strength and corrosion protection. Pedestals are backed by a 5 year manufacturer's warranty.Features: 9" Round anodized base; Base has 8" Diameter bolt pattern; 2-7/8" High-strength post; Includes non-locking Trac-Lock swivel; Rated ABYC Class H-31 AP; 5 Year warranty; Sizes Available: 18" Height; 24" Height; 30" Height;