FRAME: Aluminum + PE RATTAN WICKER WEATHERPROOF/COLORFAST/COLOR OPTIONAL 100% PURE HANDCRAFT WEARE TWO YEARS LIMITED WARRANTY Rattan beach chair set (Item# B-001) Material: 1) Frame: Top grade aluminum frame with powder-coated, light, strong and resistant.--The thickness of aluminum tube is 1.2mm 1.5, 1.8mm .Diameter in circle: 28, 25, 22, 19, 16mm,Diameter in square: 50*50, 40*40, 25*25, 20*20, ...