Fixed Height Lakeport Series Pedestal Seat Extension Post 238613L1 is 13 inches high. A great extension post for 238 Lakeport seat mounts and socket bases. For use on fishing, pontoon or cruising boats to provide seat elevation. Attwood Corporation has been an award-winning leader in engineering, testing, and manufacturing the highest quality marine products for over 100 years. We deliver safe and reliable lighting, fuel systems, water systems, seating & pedestals, swim ladders, custom upholstery, and general marine accessories that are easy to install and meet regulatory compliance.