PF WaterWorks MasterFIT Water Sense Listed Water Saving Dual Thread (15/16-27 and 55/64-27) WaterSense Bath Aerator - 1.5 GPM - Bubble Spray; PF0549 Dual Thread Brass Fitting  fits both male and female thread faucets Exceeds standards (ANSI/ASME A112.18.1) Includes one Bathroom Faucet Aerator Saves up to 7,500 Gallons annually for family of four 1.5 GPM Efficient Flow Rate