... -75mm Finish: POLISH,ACID,HL,200# polishing, 400 # polished 304 seamless tubeStainless steel is a production which not easy ... rust,acid resistance and corrosion resistance, so it is widely used ... -100*200mmshock15mm-72mmSurface treatmentPolishing (180#,220#,240#,320#400#,600#), Hairline,aid pickling and so onProduction technologySeamless ...