Black square steel pipes Thickness range: 0.45-2.0mm Outer diameter: 12x12-200x200mm Length: 4-12m Material: q235, q195, q345, a53, a500 Standard: astm a53-2007, bs 1387, gb/t 3091-2008 Technology: erw We have products such as steel pipe, black steel pipes, black round steel pipes, square steel pipes, black rectangular steel pipe high precision and so on.
