... 1.Appliccation:exhaust system 2.Perforated round hole stainless steel car exhaust pipe/tube description: 1) Standard: JIS, AISI, ASTM, DIN2 ... : 201,202,301,304,304L,321,316,316L,4307) Surface: mirror polish, satin finish8) Applicati7n: exhaust system9) Perforated round hole10) Packing ...