G 1/2 Female to 3/8 Male copper connector, match with most American water supply line converting 3/8 in. fitting size to 1/2 in. 1-package contains 2 adapters and a rubber washer is included with each. It can be used in the kitchen, bathroom sink, dishwasher, hot water heater and more, perfect for 3/8 plumbing water hoses, which will save you the hassle of replacing the valve. Made of sturdy and durable copper material, the faucet hose adapter will absolutely have a longer service life. No need to worry about harmful health and use it at ease. Faucet hose adapter coming with rubber washer, provides a perfect seal and avoids leakage. Hose reducer with deep threads allows the fittings to bite better and is not easy to slip.