QUALITY MATERIAL: The tap aerator is made of ABS plastic, and easy to use. The gasket is made of silicone; the fine mesh has a good filtering effect, which can maintain a stable and constant water flow without splashing. STANDARD SIZE: Our aerators come in standard sizes with an outer diameter of 21mm/0.83inch at the top and 18mm/0.71inch at the bottom, they are compatible with most standard M22 and M24 taps. WIDE APPLICATION: Our faucet aerators are suitable for installation and replacement in domestic kitchens, bathrooms, hotels, public facilities and other places, they help to save water and provide efficient water filtration. COMPLETE PACKAGE: Equipped with 20 sets of faucet aerators, 20 pcs of M24 green washers and 20 pcs of M22 black washers, which is enough to meet your needs such as faucet aerator use and replacement in homes, hotels and public facilities. KEY FEATURES:These hybrid faucet aerators effectively combine water and air to produce a large number of air , thereby reducing the flow of water from the faucet without reducing the water pressure. It helps to conserve water and prevent splashing. An excellent set of tap aerator tools can be used to repair or clean clogged aerators, fix low-flow taps and restore smooth water flow. Material: plastic colour: As Shown Package Contents: 20 * Faucet Aerator 20 * Green Gasket 20 * Black Gasket Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.