Make of PU, it has good flexibility and elasticity Specially designed for 1 / 2inch bottle mouth threads, it has excellent sealing and can effectively liquid leakage and loss Whether in homes, laboratories, or industrial production, good sealing can be ensured Widely used in various bottle mouths, valves, pipe joints and other connection, especially suitable for sealing requirements of drinking water, beer, oil products and liquids Suitable for various work environments, such as beverage,, food and other industries, it is an ideal option to ensuring safe and efficient operate