Made with heavy-duty 2 7/8" posts on 9"dia. machined bases, these pedestals adjust from 14 1/2"-19 1/2" in height and are engineered for strength and safety in off-shore conditions. They feature ergonomic positive-locking handles with stainless steel componenets. PowerLock Multi-Action handle controls both swiveling and height adjustment while the TwinGlide Bushing delivers a smooth operation and maximum stability at any height position. EZ-Lock CAM-Action makes for easy seat removal.Made in U.S.A.