DANCO faucet aerator, dual threaded water saving, series: 10478, 15/16-27 male x 55/64-27 female nominal, 1.5 gpm, stream: twisting spray, brass, polished brass, water sense certified, for bath and kitchen faucet. This 1.5 gpm faucet aerator by Danco has new innovative features. It has cyclone technology which reduces water consumption without sacrificing water pressure. This faucet aerator is water sense certified and can save you up to 30% water as compared to using the standard 2.2 gpm aerator.