Aerator key material: the faucet aerator keys are made of plastic, strong and sturdy, which can effectively remove faucet aerators Quantity and Size: faucet aerators size: 16.3 mm, 18.2 mm, 21.3 mm, 23.7 mm, 3 pieces for each size, 12 pieces in total, with 5 pieces faucet aerator key removal wrench tools, sufficient quantity can meet your needs Suitable for Partial Faucets: please measure the diameter of the internal thread of your faucet before ordering, and check which size of faucet aerators fits it; Note: only fits for female faucets Easy to use: with these aerator keys, you can easily unscrew your faucet aerator out and then replace or clean the blocked one, fixing low flow faucets Aerator key: help remove most faucet aerators, please measure carefully before buying in case of unfit situation Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!