AISI 304 stainless steel pipes 1.Material grade:201,202,304,304L,316,316L,321, ... . 2.High quality 3.Best service AISI 304 stainless steel pipes Detailed description Name304 Stainless Steel PipeStandard ASTM A554, A312, A249 ... :www.cnnbtl.com/www.yytl.com AISI 304 stainless steel pipes