... alkali, density is high, polishing no bubble 1Cr17Mn6Ni5N stainless steel 1.201 stainless steel material, has the acid and alkali, density is ... bubble, no pinhole wait for a characteristi 2.201 stainless steel material, has the acid and alkali, density is high, ... pinhole wait for a characteristic, is the production of atlas, strap DeGai high-quality materials, etc. Mainly used for decoration tube ...