... . 5.Surface:Black painting or oiled steel square tube/pipe 1)Thickness:0.5-30mm2)Size(dia.): ... Plumbing,Fabrication industry, Food Processing, Pharmaceutical, Petrochemical, Chemical, Machine Building, Automobile.Main marketNorth America South America Eastern Europe ... company specializing in the production and selling of square, round, rectangular pipe surfaced with galvanized coating, polish, black ...