A. The faucets and wrench-type aerators have a stainless-steel body and an ABS filter. These spray regulators are non-toxic, wear-resistant, and rustproof, offering a stable, reliable, and long service life. B. Installation doesn't require tools. The operation is simple. You can either twist the aerator by hand or use a wrench to tighten it. C. Using these faucet aerators may help save more water, provide a smoother water flow, and generate bubbles. All of these can create a high-pressure effect and reduce water consumption, making them suitable for bathroom and kitchen faucets. D. The faucet aerator wrench can be used to remove the original aerator. Its surface is covered with non-slip rubber, enabling you to easily remove the aerator cover without causing much damage. E. The package contains 15 faucet aerators with an outer diameter of 23.6 mm, a height of 13 mm, and a thread size of M24; 1 faucet aerator wrench, compatible with M20, M22, M24, and M28 specifications, suitable for bathroom and kitchen faucets.