[Water Saving] faucet aerator can fully mix the water and air flowing through to form a foaming effect, improve the scour force, and reduce water consumption. A faucet with an aerator installed saves about 30% more water than a faucet without the aerator. [Splash-proof, noise-proof, constant-current] After the water flow is mixed into the air, the aquasource faucet aerator will become softer and reduce the impact force, it can prevent the water from splashing everywhere when the water is out. [filtration]It is also a kitchen bathroom faucet filter built in , which can filter impurities well and ensure water hygiene and safety. And the sink aerator is suitable for kitchen and bathroom. [Packing List]You will receive 20 M18.5 faucet aerators for kitchen bathroom sink aerators replacement and 4 wrenches. According to the different water quality in the area, for your water sanitation and safety, it is recommended to replace the aerator directly every 3-6 months. Colour:gray+blue Material:plastic Size:18.5mm x 11.5mm Package Contents: 20 x 18.5mm faucet aerators 4 x 18.5mm wrenches Important Note Please check the diameter of your faucet before ordering to ensure that you will get the right size aerators