It is made up of 316-grade stainless steel, a highly polished surface for a mirror-like appearance and to match modern watercraft, boats, and yachts. It is a durable and long-lasting, stainless steel heavy-duty marine grade cast solid, with maximum corrosion resistance and durability in the saltwater environment. Perfect for sailing, boating, and many other marines and rough weather applications, an essential mounting accessory to any shade sail. Dimensions: Diameter: 6 mm, Height: 26 mm, Tensile strength (MPa): 212 KN. Package Includes: Pack of 1 Marine City Stainless Steel Thick Ring Round Sail Shade Pad Eye Plate Boat Rigging.