This set of Bimini Ball are made of marine grade Stainless Steel, very tough and resistant to corrosion. Quick release are that can be applied in both and commercial equipment. Solid with direct spring loaded ball provides dependable operating qualities. capacity steel gives maximum strength for all applications.Feature- Color: As shown- Material: stainless steel- Size: 4 x 3 x 1cm- for bimini top, boat tops and support poles, deck hinge etc- Made of Marine grade stainless steel, excellent seawater corrosion resistance and durable- Quick release are that can be applied in both and commercial equipment.- capacity steel gives maximum strength for all applications- Can be used for marine mountain seat, stainless steel clip, ship outfitting, shipbuilding etcPackage list: 4 x boat