Usage Tips:20pcs Faucet Aerators, M16.5 .5 M21.5 M24 Faucet Cache Aerator Water Saving Flow Restrictor With Ke INSTALLATION TOOL - The package includes 4 disassembly wrench tools of different sizes, you can use them to disassemble or install the faucet water-saving device in a few minutes, no need to borrow other tools, very convenient. GREAT EFFECT - Each swivel extension faucet aerator has a fine mesh that cushions the impact of the water and saves water by mixing a lot of air in the water, creating fine air that prevent water from splashing out. MATERIALS - The aerator for sink faucet is made of plastic, which is durable and easy to install. The fine filter screen has a good filtering effect and can maintain a stable and constant water flow without splashing. WIDE APPLICATION - Water tap filter aerator is suitable for installation and replacement of tap accessories in homes, hotels, public and other .can be fitted to kitchen sink faucets, bathroom taps and lavatory faucets spout head. Material: Plastic colour: Blue + Black Package Contents: 16 x bubbler 4 x spanner 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.