... on. Good Quality and Price The materials of our stainless steel pipes are SS200series,SS304,SS304L,SS316,SS316L,SS321,SS310S ... 30 mm.Detailed Product Description...Good Quality and Low Price Stainless Steel Pipe 1)Grade: 304, 304L, 316, 316L, 321 ... 316, 316L, 3215) Technique process: pickling, manual/machine polishing, cold drawn/ rolled, anneal6) Package: metal belt, wooden pallet, and as customers ...