Usage Tips:Material: these aerator keys are made of ABS, non-, odorless, and safe to use, convenient to remove with a long service life5 Sizes of keys: these faucet aerator keys have 5 different sizes, 16.5mm, 18.5mm, 21.54mm, 22.5mm and 24mm, a variety of different sizes meet your different needs, there is always a size that suits you, there are two for each size to replace. Note: please measure carefully before buyingPractical and functional: the faucet aerator tool set to replace or clean the blocked aerators, effectively fixes the low flow faucet and gives you smooth flow againWide application: with wide compatibility, the faucet aerator keys fit for most aerators, please check the size before buying, and come with 10 pieces to meet your need for use and replacementEasy to use: cache aerator keys can remove most aerator, replace or clean clogged air ducts with our aerator removal key to fix low flow faucets, the ABS wrench prevents scratches or damage during aerator removal or installation, bringing you a relaxing lifeColour:BlueMaterial:ABSPackage Contents:10 * Faucet Aerator Key Blue Removal Wrench Tool(Diameter 2PCS 16.5+2PCS 18.5+2PCS 21.5+2PCS 22.5+2PCS 24mm)Only the above package content, other products are not included.Note: Light reflection 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.