Description: 100% Brand New Boat Hinge. Professional marine grade cast solid 304 stainless steel. Strong corrosion resistance and durable in saltwater circumstance. High polished surface for mirror-like appearance and to match modern watercraft/boat/yacht. Easy to install,no installation instruction. Specification: Material: Stainless Steel Size( L x W ): Approx. 109 mm x 38 mm / 4 inch x 1.5 inch Hole Diameter: 5.5 mm / 0.2 inch Thickness: 2.5 mm / 0.1 inch Package Includes: 1 Piece Boat Hinge