Usage Tips:Package including: 12 pieces faucet filter cache aerator of Male 16.5mm/ 18.5mm /21.5mm /24mm and meet your different faucet sizes needs. 5 pieces cache aerator wrench tools for removing and install different sizes of cache tap aerator. Easy to installation: Faucet filter replacement comes with wrench tools which allow you to complete removal and installation in minutes. No need to have a plumber. You can done it within 1 minutes. Made of ABS material : Cache faucet aerator keys are made of durable ABS, strong and sturdy. Long-lasting and wont easily break. Wide application: Flow restrictor insert faucet aerators can be fitted to kitchen sink faucets, bathroom taps and lavatory faucets spout head, Compatible with Neoperl, Moen, Kohler, American Standard, Danze, and Groche Cache Aerators. Non-Splashing: These mixer faucet aerators mix the water and air well to create lots of bubbles and restrict the flow of water from taps without reducing water pressure. Prevent water splashing and saving water. Great faucet aerator tool set to replace or clean the blocked aerators, effectively fix the low flow faucet and gives you smooth flow again.