5305190 aerator, water economizer virtually independent of pressure with integrated flow control technology (PCA ), very low aerator, total compatibility with existing tap threads in size M24 mm x 1 cm, brass shell not necessary, anti-limescale protection thanks to the Honeycomb structure, perfect jet. Not suitable for devices not in pressure ranges ~ 2.2 gpm / ~ 8.3 litres / min, technical sheet in images, item 45305190. –