- Universal aerator for internal or external thread. Water sieve diameter in the spout 20.9 mm and 18 mm in the upper area. - Inserts suitable for bathroom taps and kitchen sinks; universally applicable. Very low noise development with filter function. - Sparkling effect and water-saving function up to 40% compared to old models; constant water flow with a flow limiter. - The tap strainer insert can be changed with a mixing nozzle key. By swirling air into the water jet, a water-saving function is achieved. - Service tip: Pack of 10 water carbonators for mixing nozzles for a water-saving insert for taps with internal thread M 20; plastic inner part is less prone to lime scale. - With the mixing nozzle set, the tap sieve internal thread can be replaced. To avoid scratches, a mixing nozzle wrench is recommended. - Suitable for mixing nozzles M22 and M24. Our tap saving attachment provides a water-saving function thanks to the flow limiter on the tap sieves. - Practical use: ideal for kitchen sinks to reduce water usage during dishwashing or rinsing; in bathroom taps for daily handwashing or brushing with a controlled, steady flow; compatible with taps using internal thread M20 and mixing nozzles M22 or M24.