This water efficient faucet aerator from Whedon provides three features that allow you to save water. First, it restricts the flow of water to 1.0 gallons of water per minute (gpm), much less than the 2.0 to 2.5 gallons oer minute consumed by the average faucet. Second, it contains a swivel feature, which works to direct the water spray exactly where needed to provide a foreceful spray without wasting water. Last, but not least, this aerator has a lever control that allows you to easily adjust the flow rate without changing the water temperature. By moving the lever up halfway, the water flow is reduced to 0.5 gallons per minute. Moving the lever up completely limits the flow to a trickle. This 1.0 GPM aerator is constructed of solid brass with chrome plating. It is dual threaded for use on male (15/16-27) and female (55/64-27) applications in kitchens and bathrooms.