Type: Faucet aerator Material: Brass, stainless-steel Thread diameter: 24mm Size: About 24x12mm Quantity: 1/2/3/5/10PCS Simple construction with nice water-saving function. It divides the water flow into many smaller streams, while aerating and filtering them. Prevent splashing and kind water jets from the nozzle Save water and decrease energy costs. Reduce knock noise. Suitable for taps with removable nozzles.