welded stainless steel pipe Material Grade: 304,304L,309,310S,316L,321,TP317,TP347 ... : Zhejiang, Jiangsu, Shandong of China (Mainland)* Mill: Qingshan, Baofeng, Taigang pipe* Certification: ISO* Material Grade: 304,304L,309,310S,316L,321 ... includes: Equality and precise wall thickness, smooth inner wall surface, without stain, inner polishing ≤02-04um.Terms & Conditions:* MOQ: 1 Piece ...