G 1/2 inch Female to G 3/8 inch Male Reducer Adapter Thread Size: G 3/8" Male x G 1/2" Female( Measure Size: Male OD: 9/16 inch; Female ID: 3/4 inch) Material: Brass, brushed nickel coating Easy Fixation: No extra tools needed, just tight the threads by hand. Feature: Solid, Durable, Anti-rust, Anti-corrosion, Wear-resistant, No leaking. They can last a long time. Package included: Four Adapters with Rubber Gasket. 【STANDARD SIZE】G 1/2 female x G 3/8 male adapter is regular US size, suitable for most pipe size with 3/8" converting to 1/2" angle stop. Solve the connection problem between the old shutoff valves and the modern faucet supply line. G 3/8 Male OD: 0.54 inch(13.8mm); G 1/2 Female ID: 0.74 inch(19.1mm). 【NO LEAKAGE】Compression adapter comes with rubber seal gasket, just tighten with the gasket provided and no leaks. No Teflon tape needed. As a converter, be threaded easily onto angle stops, connect your flexible water lines. 【WIDELY APPLICATION】Our faucet supply line adapter can be used in the kitchen, bathroom sink, dishwasher, hot water heater, etc. It is a perfect adaptor for 1/2 to 3/8 faucet hose, which will save you the hassle of replacing the valve. 【STURDY AND DURABLE】Water hose adapter is made of high-quality brass material and was treated with premium nickel coating. Solid, anti-corrosion, rust-proof, and high-temperature resistance(withstand up to 100°C / 212°F) features fit faucet hot and cold supply lines. 【SAFETY】The material of pipe compression fitting adapters are harmless, complied with safety regulations, so they can be used for drinkable water pipes. Enable you to quickly connect a kitchen faucet without having to shut off the entire house water supply.