1). Construction: 1*2, 1*3, 1*7, 1*19 2). Standard: ASTM A416, ABNT NBR 7483:2008, BS5896-1980, EN10138-3, GB/T5224-2003, IS6006, JISG3536 3.) Grade: 250K / 270K / 290K, Tensile Strength: 1770Mpa / 1860Mpa / 1960Mpa, the 1000h Relaxation is 2.0% max and the elongation is 4.0% min. 4). Categories: plain, spiral ribs, indented, galvanized, PE coated, epoxy resin coated. 5). Diameter: 9.3mm, 9.53mm, 11.1mm, 12.5mm, 12.7mm, 12.9mm, 15.2mm, 15.7mm, 17.8mm, 18.9mm, 21.6mm, 21.8mm 6). Package: Sta