[Upgraded Solid Structural Design] Boat Seat Base has a 7x7Inch locking pin 3/4Inch pin base of aluminum. It works with non-threaded 3/4Inch base pins and has an acetal sleeve for a secure fit and durability and features six bolt or screw attachments (hardware not included) [Easy to Install] With the right tools, installation is easy and only takes a few minutes, and with the center post and six appropriate stainless steel screws through the deck, Boat Seat Pedestals is a strong and secure foundation. seat pedestals bases fits with the 3/4Inch boat pedestal post, Boat Seat Swivel, suitable for most boat seats. [Fit Standard Design] Boat pedestal base fits standard 3/4 pin seat post/base, used with 3/4 inch pin posts, six screw holes for good dispersion of anchor points, plastic insert to adjust tight/ comfortable fit. Note:Installation guide not included, Please check as much as possible to make sure the item is what you need. Color:As Shown Material:Metal Package Contents: 1 * Boat Seat Base Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.