Robust Cast Construction for Heavy Duty: Built with thick 4mm ( 0.157 ") Cast steel, these hinges deliver strength and stability Suited for substantial cabin doors, hatches, and marine models Premium Marine Grade 316 Stainless Steel: Crafted from resilient 316 stainless steel, these hinges outstanding security against rust with a refined finish, ideal for challenging marine environments Dimensions & Complete Installation Hardware: Measuring 3 " x 1.5 " ( 76Mm x 38mm) and weighing 69.4G per unit, each hinge comes with 2 M5x20mm screws for hassle assembly Ready to mount on doors, hatches, and various surfaces without extra components Effortless Motion with Integrated Sliding Bearings: Equipped with sturdy pins and sliding bearings, these hinges enable smooth, noiseless operations Versatile Application for Marine & Outdoor Settings: Engineered for vessels and marine equipment, these hinges adapt seamlessly to openings, storage compartments, utility boxes, and outdoor enclosures A trusted solution for marine fittings and exterior hardware needs, Manufacturer: Hsyzygian