Female aerator for kitchen faucet 55/64 american standard female thread size available Different surface treatment available, chrome , matte black, brushed nickel Faucet aerator with flow restrictor, 1.2GPM,1.5GPM,1.8GPM and free flow rate can be chose Removable faucet aerator Can match female to male faucet adapter, to fit universal faucet styles Strong blade stream + Soft bubble streams = Ideal kitchen faucet accessory