Zhejiang Bohai Machinery Co.., Ltd is located in Zhoushan City- The largest screw andbarrel production base in China – We specialized in manufacturing screw and barrels for more than ten years. Our company strictly select high quality bimetal steel 38CrMoAlA as raw material, with latest technology and processing elaborate testing equipment from Europe and U.S to ensure product accuracy and quality. our products have a long life and good wear resistance, corrosion resistance, the company also undertake mapping, design, reconstruction and batch processing operations, and make full use of our experience in screw design, so that customers receive the materials The product has been super! Because we are professional, so we fine! Based on providing warm service to customers, we constantly pursue the perfection of production quality, and put to use new technology, Innovating new products, and gradually reducing management costs., for the way of specialization and service-oriented to establish a good brand by reputation at home and abroad !