【5-Layer Filtration】This faucet filter has a built-in 5-layer filter, 2 layers more than similar products on the market, which can better filter out impurities and ensure water hygiene and safety. Suitable for kitchen and bathroom faucets. 【Water Saving Nearly 30-40%】The faucet aerator can fully mix the flowing water and air to form a foaming effect and improve the scouring power, thereby reducing water consumption. A faucet with an installed aerator can save about 30-40% more water than a faucet without an aerator. 【Splash-proof, Noise-reducing, Constant Flow】The water flow becomes soft after mixing with air, which reduces the impact force, which can prevent water from splashing everywhere when the water comes out. So the sink faucet filters also recreate a good consistent water flow and noise reduction. 【Good Sealing】The kitchen and bathroom faucet nozzle has a sealing ring on the outside, which can prevent water from splashing to the side. At the same time, 2 plug-in faucet nozzle keys are included in the package, just use the key to tighten the faucet filter, the entire installation process is very convenient. 【Package List】You will receive 6 faucet aerators and 2 keys. Depending on the water quality in the area, for disinfection and water safety, it is recommended to replace the aerator directly every 3 to 6 months.