Hangzhou Zhedong Steel Tube Co.,ltd. is a modern industry and trading combined enterprise specialized in producing and trading high-precision thick-walled seamless steel pipes. with the first restriction mandrel rolling mill for ASSEL high -precision ?80 enhanced tube in domestic, it can produce structural tube, automobile axle casing, hydraulic prop tube, oil tube and tubing casing, etc, with advanced technology, equipment and management as well as good reputation, it can provide high quality products and service to satisfy vast customers. our company has carried out effective quality assurance system and long-term plan to maintain and improve product's quality. the whole staff of our company cordially thanks your concern and use of our products and sincerely welcomes you to put forward your valuable opinions