ITEM NAME:Heavy Duty 316 Stainless Steel 17 X 3/4 Inch Boat Piano Hinge Description: Materials: Marine 316 Grade Stainless Steel Dimension: Approx. 431.8 x 20mm/ 17 x 3/4 inches (L x W) Thickness: Approx. 1mm/ 0.04 inches Hole to hole distance diameter: 50mm/ 2 inch Universal boat accessories and door window hardware Package Includes: 1 Piece Boat Piano Hinge Note: 1.We provide clear pictures, measurements where possible. Please check as much as possible to make sure the item is the one that you need. 2. Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) 3. Instruction is not included. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand,Thank you..1 Piece Boat Piano Hinge. Materials: Marine 316 Grade Stainless Steel. Universal boat accessories and door window hardware.