Danco 10741B 0.5 Gpm Extra Water Saving Dual Thread Faucet Aerator, Chrome Extra savings up to 55% water consumption Male 15/16-27m x female 55/64-27f Dual thread 15/16 in.-27M or 55/64 in.-27F Microban technology fights odor causing bacteria, mold and mildew WaterSense certified 1.0 GPM