The Attwood Swivl-Eze 238 Series Extension Post is constructed of a super-hard anodized aluminum alloy that exceeds all Type A driver-side requirements for lateral strength. The release button operates smoothly and requires less effort to unlock it from the base. Not recommended for interchanging with other manufacturers' products.• Fixed height extension post• Super-hard anodized aluminum alloy construction• Anti-rotation locking pin• 15" high from deck to top of seat mount• Fits 2-3/8" diameter socket• ABYC code AO, suitable for driver/helm position Smooth release button requires less effort to unlock from base 15" fixed height from deck to top of seat mount Fits 2-3/8" diameter socket | Swivl-Eze 238 Series 15" Extension Post