Description: 5 Sizes Available M16.5, M18.5, M21.5, M22.5, M24, for you to remove varied sizes of cache faucet aerators. Remove most faucet aerator, replace or clean clogged air ducts with our aerator removal key used to fix low flow faucets. Faucet aerator tool set to replace or clean the blocked aerators, effectively fixes the low flow faucet and gives you smooth flow again. Made of ABS plastic material, durable odorless. Handy and practical tools, convenient to remove and to use. Specification: Material: ABS plastic Size Chart: Diameter: 16.5mm/0.65inch 18.5mm/0.73inch 21.5mm/0.85inch 22.5mm/0.89inch 24mm/0.94inch Package Includes: 5x Faucet Aerator Key(4 Pack) Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!