Material: These aerator keys are made of ABS, non-toxic, odorless, and safe to use, convenient to remove with a long service life 5 Sizes of keys: These faucet aerator keys have 5 different sizes: 16.5mm, 18.5mm, 21.5mm, 22.5mm, and 24mm. A variety of different sizes meet your different needs, there is always a size that suits you, with two pieces for each size for replacement. Note: Please measure carefully before buying Practical and functional: The faucet aerator tool set helps replace or clean blocked aerators, effectively fixes low flow faucets, and restores smooth water flow Wide application: With wide compatibility, the faucet aerator keys fit most aerators. Please check the size before buying. Includes 10 pieces to meet your needs for use and replacement Easy to use: These aerator keys can remove most aerators. Replace or clean clogged aerators with the aerator removal key to fix low flow faucets. The ABS wrench helps prevent scratches or damage during aerator removal or installation, providing convenient and reliable performance Color: Blue Material: ABS Package Contents: 10 x Faucet Aerator Key Blue Removal Wrench Tool (2 pcs 16.5mm, 2 pcs 18.5mm, 2 pcs 21.5mm, 2 pcs 22.5mm, 2 pcs 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 to vary slightly from the real thing. Measurement may have an error of +/- 1-3cm