321 stainless steel tubes 1.Grade:304,304L,316,316L,321,317L,310S,904L ... on. 2.Standards:ASTM,JIS,DIN,GB ,etc 321 stainless steel tubesFeatures:1) pipe diameter : 6mm-630mm pipe thickness : 0.8mm ... : A Dist.33,Steel Market,Fenghuang Industry Park,Dongchangfu Dist.,LiaochengMobile:0086-13326353000Tel:0086-0635-5082088Fax: 0086-0635-5080066 321 stainless steel tubes