High quality material: Our faucet aerators and aerator key are made of high quality chrome-plated brass with the addition of a non-toxic and very durable ABS plastic filter, which fits perfectly to 24mm outlet. Easy Installation: No tools required for installation. It's very simple, you just use your hand and directly tighten the water saver or if you want you can use a wrench to tighten it more. Save water : With these faucet aerators, you can now save water, have a steady water flow, create air bubbles, lead to high pressure and low water consumption. Suitable for bathroom and kitchen faucets. Non-slip rubber: Our aerator key can also be used to remove the faucet as well as the aerator, it has a anti-slip rubber, then the aerator shell can be removed more easily and thus you will not damage it. Package: 15pcs faucet aerators, outer diameter: 23.6mm , height: 12mm, thread size: M24.