Lifesaver 10 PACK - Neoperl 2.0 gpm, dual thread aerator (Dual threaded to fit both male and female ends). Best quality and performance at a lower cost. NSF 61 approved. Aerated stream produces a larger and whiter stream that is soft to the touch and non-splashing. Non-Pressure compensating, easy to install, no tools necessary. 15/16” standard male and 55/64” standard female threads. Comes complete with instructions.-------------Aerated stream Aerators introduce air into the water stream to produce a larger and whiter stream soft to the touch and non-splashing. Aerators are the usual choice for residential faucet applications.----------------------------------The Pro Pack comes in a Lifesaver pack, A perfect way to keep your aerators organized for dispensing one at a time as needed. The lifesaver pack is easy to store and use. Great for plumbers, apartments, condos, homes & commercial places. Create a great full flow faucet in your kitchen, bathroom or utility sink. Not for use in California or any state/area that requires lower flow rates