... the first grade material in China. 2,advanced testing equipment. 3,competitive price . stainless steel pipe 3091.ASTM,DIN,JIS,EN,KS ... ,annealing. stainless steel pipe 309 1.Sizes:Diameter:6-610mm Wall Thickness:0.5-60mmO.D:3/8",1/2",3/4 ... ",1",1 1/4",1 1/2",2",2 1/2",3",3 1/2",4",5",6",8",10",12",14",16 ... piece then packed in seaworthy --wooden cases or as request. High quality 309 stainless steel pipe