Specifications: 24mm outer wire (copper shell). Faucet aerator: male adapter for your faucet head, very comfortable jet aerator without losing comfort. 30% to 80% less water use at home: save water and save money. ANTI - Lime Valve Tip: It is very easy to clean with white vinegar once a year. Installing it, removing the old aerator and replacing it with this practical and unusual professional gadget on the tap is child's play. For showers, we recommend placing our model restrictor before the showerhead hose. This water saver is offered to you by the company at an attractive price. Save on electricity bills because there is less hot water to heat! Do you still have questions? This product is safe, try it and accept it!