[SET OF 2] WATER SAVER: Male adapter that fits on the head of your mixer, swan neck provide the female model, differ from a jet aerator because the comfort is not reduced. Also adaptable on shower tips. [REDUCE BY 30% TO 80%] your water consumption at home: Save water and money, thanks to its adjustable function (screw in the middle that you open or close) adjust your own water flow without loss of comfort. No need to touch the pressure reducer. [ANTI-LIMESCALE TAP TIP]: It is very easy to clean thanks to its removable orange filter, stop the aerator clogging. It will be child's play to install it, dismantle the old aerator and replace it with this unusual useful Professional gadget on your taps. For the shower we recommend our flow limiter model to be placed before the shower head hose.