Features: Black pipe and hot galvanized pipe 1) Size: OD12.7 ~ 219mm 2) Standard: BS1387, ASTM-A53A, JIS-G3444 Square and rectangular tubing 1) Size: 12 x 12mm~400 x 400mm; 10 x 20mm ~ 300 x 500mm 2) Thickness: 0.5 ~ 12mm 3) Standard: GB/T6728, ASTM-A500 Packing: Export standard bare bundle