LASCO 09-1017 Chrome Plated 2.2 GPM Dual Thread Aerator, 5-Pack Not for sale in California Chrome plated brass Dual thread 55/64-Inch - 27 female X 15/16-Inch -27 male thread 2.2 GPM at 60 PSI 5/pack Lead free product, meets California AB-1953, Vermont, and new federal standards for low lead applications