... 2)Competitive price stainless steel round pipe,stainless steel pipe,304 round pipe 1),Main standards:GB,ASTM,DIN,EN and ... GOST etc.2),Grade:304,304L,316,316L,321,310S3),Size:6mm-830mm(OD)*1 ... according to customers' requeststainless steel round pipe,stainless steel pipe,304 round pipe