High-Quality Material: The faucet aerator is made of ABS plastic, durable and easy to use. The gasket is made of silicone, and the fine mesh has good filtration effect, maintaining a stable and constant water flow without splashing water. Standard Size：Top OD is 21mm/0.83", Bottom OD is 18mm/0.71", standard size for built-in insert mounting, fits most standard M22, M24 faucets. Sufficient quantity: equipped with 20 sets of 1.5GPM faucet aerators, 10 M24 green gaskets and 10 M22 black gaskets, enough to meet your use and replacement needs. Key Features: These mixing faucet aerators effectively combine water and air to create large amounts of bubbles, thereby reducing water flow from the faucet without reducing water pressure. It helps prevent water splashing by conserving water. An excellent faucet aerator tool set can be used to repair or clear a clogged aerator, restore low-flow faucets, and restore smooth water flow. Wide scope of application: The aerator is suitable for most faucets and used in home kitchens, bathrooms, hotels, restaurants, public places and other places.