Two Units of Stainless Steel Bimini Top Hinge - Rail Mounts 7/8" which are Ideal for installing Bimini tops, stringers for fender racks and other rail-mounted devices without disassembling the rail. Type 316 stainless steel has the best corrosion resistance among standard stainless steels. It resists pitting and corrosion by most chemicals, and is particular resistant to saltwater corrosion. Marine parts construct of 316 stainless steel outlives those built of other materials, especially in warmer tropical waters, where saltwater corrosion is a formidable adversary