This faucet aerator has three features to help you use water efficiently. First, the maximum flow rate is just 1.0 gallons of water per minute (gpm), less that conventional faucet aerators for which the flow is typically 2.0 to 2.5 gpm. Second, the swivel feature allows you to direct the spray right where you need it, giving you a forceful spray anywhere in the sink while minimizing wasted water. Finally, the lever control means you can quickly adjust the flow rate without affecting the hot/cold mix. Moving the lever up halfway will reduce the flow to 0.5 gpm, while moving it all the way up will reduce it to just a trickle. The solid brass chrome-plated aerator is dual threaded (15/16ths-27 male and 55/64th-27 female), allowing it to fit most kitchen or bathroom sinks.