Specifications: Length x Width: 2 inches x 2 inches (50mm X 50 mm), Thickness: 4 mm (0.157 inches)..Screws: 5 x 20mm. Marine grade stainless steel: stainless steel provides excellent corrosion resistance and has a polished surface. it can withstand harsh Marine environments and is not easy to rust. Heavy duty cast construction: Thickness: 4 mm (0.157 inches). It will last long even if the hinges withstand heavier doors and larger hatches. opening and closing: The knuckle and solid pin increase strength and provide operation. These hinges operate with sliding bearings, which open and close smoothly without noise. Wide application: These hinges are perfect for exterior applications and can be inserted into doors and hatches. Applicable to boat/ family/marine/yacht or windows, lockers, cabinets, decks, gates, toolboxes, etc. Boat Hinges Marine Grade Mounting Type:Door Mount If we're using it outdoors, and we want something that's load-bearing and durable, It will last long even if the hinges withstand heavier doors and larger hatches. Our hinges operate with sliding bearings, which open and close smoothly without noise. We have repeated opening and closing tests to that the hinge is open and closed without problems. Colour:silver Material:Stainless steel Package Contents: 4 x hinges(2-inch x 2-inch hinges) 16 x screws 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.