Specification:(￠6-￠580)?1-30)?3000-12000)mm we also can supply special specification through the negotiation Main material:304,304L,321,316,316L,317,310S and so on Standard of stainless steel seamless tubes : ASTMA269 ,ASTMA312,ASTMA511,ASTMA213/A213M,ASTMA312/A312M JIS3446,JIS3448,JIS3459,JISG3463,DIN2462 ISO9001:2000CERTIFACATION Zhejiang Nanhua Steel Tube Made Co.,Ltd