Bubble-Stream 90430.05 PCA Aerator, Dual Thread, 1.0 GPM, 15/16"-27" x 55/64"-27", Chrome Water sense certified 1.0 GPM Pressure compensating water stream Save up to 55 percent compared to standard 2.2 GPM aerator 15/16-27x55/64-27 fits most faucets with inside or outside threads Easy installation