Attwood Swivl-Eze Boat Seat Pedestal ExtensionThese fixed height pedestal extensions are constructed from anodized aluminum. The locking latch features a low-friction ramped bottom along with the release button makes for easy installation into the corresponding boat seat base. The pedestal heights are measured from the deck to top of the seat mount.Product Features: Corrosion Resistant; Anodized Aluminum; For use with 238 Series Socket Bases; Easy to Use Release Button; Locking Latch; Available in 10", 12", & 13" lengths;