Xi'an Shew-E Steel Pipe Co.,Ltd is one of the leading st44.4 precision tube suppliers and also a famous such manufacturer, equipped with many professional st44.4 precision tube factories, welcome to purchase high quality st44.4 precision tube from our company.Standard: DIN1630Materials: St44.4Technical: cold-draw Application: used in the hydraulic cylinder of the Heavy Machinery, Cranes, Excavator and Forklifts.Tolerance: