Package includes: you will receive 10 pieces green tap aerators (2.1 x 1.8 x 1.1 cm), 10 pieces black washers with a diameter of 2 cm. Material: Our faucet aerator is made of plastic, which is sturdy and durable, excellent workmanship, no corrosion, no clogging, no rust, no peculiar smell. Function:Our aerator produces very low noise and saves water. It provides enough air bubbles to avoid splashes and water erosion. The impurities are filtered in the best way, the water flow is large and even. Application: suitable for households, hotels, public facilities and other places, perfect for kitchen sink tap or sink tap, which contributes to saving water and filtering water. Suggestions: Due to the different water quality in the environment, it is recommended to replace the aerator directly every 3-6 months.