Description: Features: brand new and high quality Made of durable ABS, non-toxic, odorless, and safe to use, convenient to remove with a long service life 5 sizes of keys: M16.5, M18.5, M21.5, M22.5 and M24, a variety of different sizes meet your different needs. The faucet aerator tool set to replace or clean the blocked aerators, effectively fixes the low flow faucet and gives you smooth flow again. Easy to use: aerator keys can remove most aerator. The ABS wrench prevents scratches or damage during aerator removal or installation. How to choose: first you should measure the diameter of cache aerator, then choosing a right size of aerator for key, and finally to install the selected one on your home faucet. Specification: Color: Blue Material: ABS Outer Diameter: 16.5mm(0.65in)/18.5mm(0.72in)/21.5mm(0.84in)/22.5mm(0.88in)/24mm(0.94in) Quantity: 1 set(5pcs) Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 set(5pcs) x Aerator Wrench(other accessories demo in the picture is not included.)