1.SEAMLESS steel tube, 2. Production based on DIN2391, EN10305-1, ... function in wooden cases.Delivery: Within 30 days.1.steel tube2. Production based on DIN2391, EN10305-1, EN10305 ... size.4. Prime quality of raw material from famous steel mill5.High cleanness on both inside surface and outside ... in the record.Standard: DIN2391, EN10305-1, EN10305-3.Steel grade: ST35, ST37, ST45, ST52, E235, E355.Tube ...