The faucet aerator key removal wrench tool is available in 5 sizes for the cache aerator feature: 1. Keys in 5 Sizes: These faucet release keys are available in 5 different sizes, M16.5, M18.5, M21.5, M22.5 and M24. Various sizes can meet your different needs. 2. The blocked aerator can be replaced or cleaned, and the low-flow faucet can be effectively fixed, allowing you to re-flow the water. 3. Standard size faucet aerator, a great replacement for bathroom or kitchen faucet aerators, ensuring smooth flow. 4. Easy to use, it only takes a few minutes to replace, saving time and effort. Colour: blue Size: as shown Quantity: 4sets (20pcs) 1.As different measuring methods,it will occur 1-3 cm deviation about the items,please ensure that cm it is okay for you before ordering. 2. Because of different monitors and lamplight, the picture may not reflect the actual color of the item, really thank you for your kind understanding 3. Only the above package contents, excluding other products