Water pipe connection, faucet replacement, water purifier installation, outdoor use; easy connection of different diameters, no more worries about incompatible interfaces; quick adaptation of new and old faucets and hoses; no need to modify pipes, saving time and effort; water purifier inlet and outlet are easy to connect with a simple turn; garden/car wash water pipe connection; weather-resistant and rust-free brass; high-quality brass, corrosion-resistant and anti-aging; precision threads, good seal to prevent leakage; double pack, convenient for spares or multiple installations.