Neoperl 12 9200 5 Economy Flow PCA Various Single Swivel Spray Aerator, Dual Thread, 1.5 GPM, 15/16"-27 x 55/64"-27 Threads, Chrome Finish, Plastic Chrome Finish Vario switches from an aerated stream to a spray with a simple twist This eliminates any unnecessary mechanical stress on the faucet neck that a pull down swivel causes This swivel features the Perlator aerator and a built in pressure compensating 1.5-GPM flow regulator to maintain a constant economy flow 15/16-Inch by 55/64-Inch-27-Inch