Perfect use: Flow restrictor insert faucet aerators can be fitted to kitchen sink faucets, bathroom taps and lavatory faucets spout head.Package includes: A total of 8 ABS cache aerators wrenches and 8 faucet filter restrictors include M16.5, M18.5, M21.5, and M24, meet your different needs.The flow rate of each of these aerators:1.2GPM,1.5GPM,1.8GPM ,2.2GPM.Strong Aerator Keys: Cache faucet aerator keys are made of durable ABS, strong and sturdywhich is very convenient to remove and fix the bubbler, and has a long service life.Easy to use: Faucet screen tip replacement comes with keys allow you to complete removal and installation in minutes, and save the huge cost of having to call in a plumber.Practical and effective: Faucet aerator insert can ease the impact of water, and prevent water from splashing by generating lots of bubbles, and effectively fix the low flow faucet and gives you smooth flow again.