The 22mm female thread aerator (FM22) will fit your male thread tap (diameter is an actual measurement of about 21.5-22mm) Universal female floors for taps Reduce water consumption by 30%-70% High-end materials, finished technology, fine workmanship, for guaranteed quality and longevity Easy to install and very convenient for washing the sink It allows you to adjust the size of the water flow. The shower water will not leave the water gradually seeping everywhere. Foam mode Change the game for your sink Just a slight twist of the nozzle and the flow changes from jet (aerated) to shower. You can switch between them easily and the swivel action is really useful when rinsing dishes etc. The shower water will not leave the water gradually seeping everywhere. Everything is chrome plated, a simple and elegant design that works well. A great flow improvement over the existing kitchen valve. Full sink depth cleaning range You can direct the water flow in all directions, which is great for cleaning things. Instructions Clear instructions and an extra adapter, which means it can be used with male or female screw parts (it doesn't matter if your faucet screw is inside or outside)