To protect the threads and sealing when used in handling, transportation and storage blocks and bush thread protectors should be designed to help to make the supermarket or gas into the residence to minimize corrosion caused by plastic thread protectors Chittagong thread protectors | plastic thread Protection | n Tong Machinery (certified merchants) are provided by Ning Tong Machinery Plastic Co., Ltd. County is. Ning County is Tong Machinery Plastic Co., Ltd. (www.dzztjx.com) is specialized in "Fuk Loi wheel, omni-directional wheel, universal ball, wheel and other two-way," the enterprise, the company adhering to the "honesty, hard service" concept To provide you with the highest quality products and services. Welcome to inquire! Contact: song manager.