... : 0.8-20.0mmB: Surface finish: black, blank, bright and galvanized C: Length of each pipe: 500mm-16,000mm D: Steel grade ... , SAE1045, X40, X60 etcE: Conforms to international standards, like: ASTM A53, ASTM A500, ASTM A513, BS1387, DIN2391, DIN2394, DIN17175, JIS G3452, EN10210, EN10305 ...