specification:(6-630) x(1-24) x(4000-12000) mm main material:TP304, TP321, TP304L, TP316L, SUS304, SUS316, SUS321, TP304H, TP316H, TP317H standard of stainless steel seamless tubes: ASTM A213, ASTM A312, ASTM A267, JIS3446, JIS3463, JIS3459, DIN2642, certification: ISO 9001:2000 .