Package Contents: You will receive 10 pieces of M18.5 faucet aerators and 2 pieces of aerator wrenches, sufficient for regular use. Due to varying water quality, it is recommended to replace the aerator every 3 to 6 months to maintain water hygiene and safety. Premium Material: Our aerator nozzles are made of high-quality plastic, offering durability, excellent craftsmanship, and resistance to corrosion. They do not clog, rust, or produce unpleasant odors. These faucet aerators are compatible with most M18.5 faucets. Water Saving: This faucet aerator operates quietly and helps conserve water. It fully mixes water and air to create a non-splashing, foaming flow that is smooth, steady, and comfortable to use. Simple Installation: These kitchen faucet aerators are easy to install and remove without the need for special tools. Use the included wrench to securely attach the aerator to the faucet. The filter head can be easily removed for cleaning when needed. Wide Application: Suitable for use in homes, hotels, and public facilities. Ideal for enhancing kitchen sink faucets or basins by improving water flow and filtration. Perfect for restoring performance to low-flow faucets or replacing damaged aerators without changing the entire faucet.