The Springfield Marine Non-Removable Pedestal System in 2-3/8" offers a heavy-duty base and post for today's larger and faster recreational boats. The base is a permanent mold aluminum alloy with a satin finish. A 2-3/8" heavy-duty extruded post is pressed and hydra-formed into the base which mechanically forms them together. This proprietary process allows maximum strength for a sturdy pedestal.• 2-3/8" pedestal• 9" round base with 8" bolt pattern• Cast aluminum with satin finish• Height adjustment from 13-3/8" to 16-3/8"• Trac-Lock locking swivel rotates 360°• Locks in the forward position• ABYC class AD Manual height adjustment from 13-3/8" to 16-3/8" Trac-Lock locking swivel rotates 360° Locks in the forward position | Explorer Manual Adjustable 2-3/8" Pedestal with Swivel, 13-3/8"-16-3/8"H