Material: 201 202 304 304L 316 316L 321; 310S; 2205; 904L Standard: ASTM a554, JIS G3446, A312 Type: stainless steel seamless steel pipe stainless steel welded pipe Shape: square tube, round tube Surface finish: 180 mesh, 320 mesh, 400 mesh, 600 mesh Surface treatment methods: mechanical drawing, mechanical grinding, buffed polished, pickling or passivation, bright annealing and sub electrochemical polishing.