attwood Fixed Height 238 Series Boat Pedestal Seat Extension Post 238615-3 15" High Boat Seating Accessories Hard anodized, corrosion resistant aluminum seat pedestal Locking latch has low-friction ramped bottom for smooth insertion into base Release button operates smoothly requiring less effort to unlock post from 238 series base Select from 238 series posts to get the perfect height for your boating fun All springs are stainless steel