Material:This faucet adapter is made of engineering plastic, which is wear-resistant, rust-resistant and lasts longer than plastic. 3-in-1 design:Each adapter can be divided into three parts and is designed with long threads and rubber rings to connect valves with an outer diameter of 1/2'' to 3/4''. Clamp ring adjustable: Our round faucet adapters are designed with an adjustable stainless steel clamp ring that can be adjusted by the handle, saving time and effort. Easy installation: Align the adapter with the faucet, then tighten the clamp ring with the handle to secure it. No tools are required and the nozzle can be connected directly to the water pipe. If the faucet is too large, you can remove the rubber ring inside. Field of application: The adapter with rubber ring prevents leaks and is suitable for most faucets with round or oval spouts, garden hoses, car wash accessories, washing machines, etc.