Colour: silver Materials: 304 stainless steel and brass Dimensions: Outer body height: 17.3 mm Theoretical thread diameter: 22 mm Actual thread diameter: 21.5mm Contents: 6 replacement faucet aerators. 6 rubber seals. 1 aerator key. This aerator is ideal for high pressure faucets to reduce water flow and prevent water from splashing on you or out of the sink, helping you save money the water. You can use it for your kitchen or bathroom faucet and replace the old faucet water filter. Also, these faucet aerators are perfect for restaurants, hotels, apartments, public restrooms, etc. where faucets are often used.