Made out of cast aluminium, this swivel top is built marine-tough to handle the harsh marine environment in its stride. Designed to plug onto a 330mm post and with a standard 7" mount plate design, it will accommodate most boat seats with ease. With a thumb screw-style clamping mechanism to secure it to the post, this swivel top is perfect if your current one is getting a bit tired and not spinning the way it used to, and is in need of replacing. This is exactly what you need, ideal for use in any boat with a 330mm pedestal. For the full range of seats, swivels, pedestals and cushions as well as everything else in our huge range, call into our store and talk to one of our friendly, knowledgeable staff to find the one that's perfect for you.