Hebei Huayu Special Rubber Co., Ltd. is the professional manufacturer of complete union products in China with many years experience. We have advanced equipment and skilled workers to produce super high quality union products and we test and check products before they are delivered to customers. And this is the reason why we have won high reputation among customers and we have made great achievement in union industry. We manufacture and supply complete union products, including hammer union, air grip union, mud tank union, self-sealing fitting and thread protector. They are all used to conn