The package contains: You will receive 10 green faucet aerators (2.1 x 1.8 x 1.1 cm), 10 black washers with a diameter of 2 cm. Material: Our faucet aerator is made of plastic, sturdy and durable, with excellent workmanship, no corrosion, no clogging, no rust, no peculiar smell. Functionality: Our aerators produce very low noise and save water. It provides enough air bubbles to avoid splashing and water erosion. Impurities are filtered optimally with a large and even water flow. Application: Suitable for home, hotel, public facilities and other places, very suitable for kitchen sink faucet or sink faucet, helps to save water and filter water. Suggestions: Due to the different environmental water quality, it is recommended to replace the aerator directly in 3-6 months.