TOP 3 - A single heavy-duty and corrosion-resistant pedestal was built to last. All maritime seat manufacturers can use the same hole layout. This seat is a highly convenient choice due to its thick wall, polished finish, and adjustable height. All maritime seat brands are compatible with the 5 1/4" hole design. Includes an aluminum base with a seat mount. The Quick Lock pedestal provides a convenient, secure mounting solution for your boat seat. With the push of a button, you can easily adjust the height from 12 to 18 inches. This feature makes it ideal for different water activities and allows quick access to whatever tools or supplies are stored underneath your seat. Technical Features: 9-inch diameter pole 360°swivel adjustable from 12-Inch to 18-Inch PROS🟢 Easy to adjust and use No mistake in choosing the right one for your boat CONS🔴 No slide included