1,Function: Reduce the impact of water, generate a lot of air bubbles, avoid splashing water, and the filter inside can filter out most impurities. 2,Application: Aerators are very practical faucet replacement accessories. Suitable for kitchen bathrooms, hotels, public toilets and other places. 3,Dimensions: Faucet aerator top outer diameter is M16.5mm or 0.65in, bottom outer diameter is 14mm or 0.55in, standard size. 4,Premium Material: The faucet flow retrictor is made of ABS plastic, which is lightweight, durable to use and easy to install. 5,Package Included: Package includes 4 faucet aerators and 1 wrench, enough to meet your different needs, please measure the size of the faucet before buying this aerator. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.