DIN 2391precision steel tubes
4) Size:OD4-50mm. WT0.8-6mm Max length 13m.
5) All steel tube can test , Eddy current flaw detector, depend on customers requirement
6) Usage: cylinders of machinery, high pressure tubing
7) Characteristic: high cleanness, smooth on the both surface, chemical composition and mechanical properties fully according with standards.
8) Surface Finish:  black phosphated, oiled, or bright.