... , No.4, HL NSP, Bead Blast, Vibration,HL Gold, Mirror Gold, Vibration Gold NSP No.4 Copper NSP, Mirror Copper, Bead ... Etched, HL Etched Copper, Mirror Black Etched, Mirror Etched Gold.Steel Standard:JIS, AISI, ASTM, GB, DIN, EN,ASTM A312, ... ,431,440Steel Type:Stainless steelTechniqueHot rolled /Cold RolledApplication:Stainless steel tubes usually applied in motor,construction, oil, medicine, food, ...