The CS3080 Boat Cover Support inserts into Burnewiin mounts and is designed to accept standard wood and fiberglass boat cover supports and/or battens. The CS3080 boat cover support socket accepts supports and battens with a rectangular section up to 3/8" (9 mm) high and 1 7/8" (47 mm) wide. Many boaters also use the CS3080 as a cover for their universal Burnewiin mounts when the mounts are not in use.Includes 2 Boat Cover Support per package.