5-Layer Filtration: This water-saving faucet aerator features a built-in 5-layer filter, which is two layers more than similar products on the market, providing superior filtration of impurities for water hygiene and safety. Suitable for kitchen and bathroom faucets. Approximately 30-40% Water Saving: The kitchen faucet aerator thoroughly mixes water and air to create a foaming effect, enhancing scrubbing power and reducing water consumption. A faucet with an installed aerator saves about 30-40% more water than one without. Splash-Proof, Silent, Constant Stream: By mixing water with air, the stream becomes softer, reducing impact and preventing water from splashing everywhere. This sink faucet aerator also ensures a consistent water flow and reduces noise. Good Sealing: The faucet aerator nozzle has a tight sealing ring on the outside to prevent water from splashing sideways. The package includes 2 wrenches for easy installation; simply screw on the faucet aerator with the wrench for a convenient setup. Package List: You will receive 6 faucet aerators and wrenches. Depending on your local water quality, it is recommended to replace the aerator every 3-6 months for sanitation and safety.