Inflatable Boat & Marine USA Bimini Top Swivel Deck Hinge - Fittings/Hardware 316 Marine Stainless Steel Precision cast 316 Marine Grade Stainless Steel Maximum corrosion resistance and durability in the saltwater environment. Polished to a beautiful, mirror-like finish. Universal fit - allows mounting in almost any angle. Horizontal or vertical mount. See additional details in product description below.