AGPTEK Swing Seat with 66 Inch Anti-Rust Chains 250lbs. Opened, but unused. Thermoplastic Coated, 5.9"D x 24"W x 66"H, Metal, Alloy Steel. The swing seat is composed of EVA plastic, The size of U-shape of the swing seat is “24 * 5.9” inches. The size of each zinc-plated chain is 66 inches long. Of which, 30 inches are covered with thermoplastic so as to prevent from anti-corrosion and rust protection. Metal plate is made from some kind of metal material called 201 stainless steel.