The NEOPERL 0.5 GPM Dual-Thread Ultra-Saving Faucet Spray Aerator features a pressure-compensating water stream in a spray pattern. It allows 0.5 Gal. of water to flow per minute, ensuring more efficient water conservation. The pressure compensating design helps to maintain a constant and comfortable water flow regardless of pressure fluctuations. The aerator connects to faucets with inside and outside threads.