Materials:The strap hinges made of precision cast marine grade 316 stainless steel. Application:Boat strap hinges for interior hatch,locker,hatch windshield,deck hatch,compartment,doors and more. High quality:Boat hatch hinge use mirror polished surface,Maximum corrosion resistance and durability in the saltwater environment. The size:Casting strap hinges length:4 inch (101mm),width: 1 inch (25mm),thickness: 0.18 inch (4.5mm). Easy to Install:Stainless steel strap hinges used to replace hinges on boat, lids, hatches, compartments, and doors,include installation screws, easy to install. The casting strap hinges made of marine grade 316 stainless steel Material,these hinge is very good marine hardware.strap hinges fit for home,marine boat,yacht door or window,locker,cabinet,deck,tool box.etc.these hinges Polished finish.It can adapt to the marine environment and has corrosion resistance in salt water environment.Easy to install.