Material: These aerator keys are made of durable ABS, non-toxic, odorless and safe to use, convenient to remove with long service life 5 sizes of keys: these aerator keys faucet aerator have 5 different sizes, M16.5, M18.5, M21.54, M22.5 and M24, a variety of different sizes meet your different needs, there is always a size that suits you, there is two for each size to be replaced. Note: Please measure carefully before purchasing Practical and functional: The faucet aerator tool set for replacing or cleaning blocked aerators, effectively fixes the low flow faucet and gives you smooth flow Wide Application: With wide compatibility, the faucet aerator wrenches are suitable for aerators with serrations and screw threads, and come with 5 pieces to meet your usage and maintenance needs. replacement Easy to use: Cache aerator wrenches can remove most aerators, replace or clean clogged air ducts with our aerator removal wrench to fix low flow faucets . The ABS key prevents scratches or damage during removal or installation, bringing you a relaxing life Color blue Quantity: 5 pieces