1FunctionREPLACE THE FILTER IN THE BATHROOM OR KITCHEN: The aerator on your faucet can restrict water flow. Upgrade your faucet with a aerator for a refreshing, unrestricted flow. 2Non-Splashing18.5 MM/0.73 INCH PLUG-IN FLOW RESTRICTOR:make your water use more efficient. It is made with an 18. 5 mm/0.73inch plug-in flow restrictor. 3High-quality ABS material Faucet aerator and key removal wrench are made of ABS plastic, which can be reused for a long time. 4Package includesContains 6 pieces of 18.5mm / 0.73 inch buffer faucet replacement parts inserted into the aerator + 2 pieces of disassembly wrench tool. 5Easy to installThis product includesreplaceable filter ,Disassembly wrench tool.No professional workersSame that can be easily installed to replace the original filter for your bathroom or kitchen faucet.