Specification:(¢6-¢580)×(1-30)×(3000-12000)mmMain material:304,304L,321,316,316L,317,310S and so onStandard of stainless steel seamless tubes :ASTMA269 ,ASTMA312,ASTMA511,ASTMA213/A213M,ASTMA312/A312MJIS3446,JIS3448,JIS3459,JISG3463,DIN2462ISO9001:2000CERTIFACATION