Material: High quality chrome plated brass. Available sizes: 16/18/20/22/24 mm external thread adapter to 22 mm external thread adapter (please refer to size instructions) Add additional extended faucet adapter capacity to the existing faucet aerator to extend the connection length of the aerator. Packaging content: 2 threaded adapters and connectors Equipped with rubber seals to prevent water leakage. Easy to install, simply unscrew the existing aerator from the faucet and manually tighten the adapter. Please measure the dimensions as shown in the picture and ensure that the type is exactly what you need. Suitable for most faucets, used to connect sink faucets and aerators in kitchens, bathrooms, or gardens.