[Strong Plastic Construction]- The cache aerator kit is made of strong ABS material which is strength and reliability, Strong wrench NOT easy to bends, so has a good grip.Quick and easy to replace[16 Pack]- 12pieces faucet cache aerator of Male 16.5mm/ 18.5mm/21.5mm/24mm,meet your different sizes needs. The handy key ring keeps them together and includes 4 size cache aerator key,In case of loss and provide convenience for your storage[Multi Size Aerator Keys]- The replacement part comes with 4 different size removal wrenches Tool, which will help you to remove or install in minutes, Save both money and time[No Spraying]- Each aerator has a fine mesh which can ease the impact of water, and prevent water from splashing by generating lots of bubbles.No more water spraying all over. Shaping the water stream coming out of the spout[Wide application] Flow restrictor insert faucet aerators can be fitted to kitchen sink faucets, bathroom taps and lavatory faucets spout head, suitable for Neoperl, Moen, Kohler, American Standard, Danze, and GrocheColour: blue + blackMaterial: plasticPackage Contents:12 x bubblers (16.5mm/18.5mm/21.5mm/24mm)4 x wrenchesOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.