Features One Way Valve: This non return valve ensures stable flows, it also has filter to remove the impurities, very reliable. Safer Sealing: Integrated structure enables good sealing performance, which can effectively prevent the liquid leakage. Practical Use: Mainly used for water, oil, non corrosive and incombustible gas, suitable for kitchen, bathroom, etc. Good Material: Adopting high quality brass material with excellent durability against corrosion and long term using. Easy to Install: G1 thread together with 99mm total length and a light weight makes the installation very convenient. Specification: Item Type: Check Valve Material: Brass Thread: G1in Overall Length: Approx. 99mm / 3.9in Package List:1 x Check Valve Note:Match to the appropriate size before use. Package List 1 x Check Valve