This aerator is designed to cut down on unnecessary water consumption (washing hands, brushing teeth, shaving etc.) from your taps. Aerators save water by reducing its flow and aerating the stream. Comfort of usage stays the same. Flow reduction depends on the model chosen. Installation is very simple and doesn't require any special tools.An aerator serves the following purposes: - prevent splashing - shaping the water stream coming out of the faucet spout - saving water and reducing energy costs - reducing faucet noise Faucet aerators are often used in homes with low water pressure in order to increase the perceived water pressure. This aerator has a 22mm female thread. Specifications: - Material: Stainless Chromed Brass - Reducing water usage up to 50% - Thread Size: M22mm FEMALE - Made in Spain