Function: Replace the filter in the bathroom or kitchen. The aerator on your faucet can restrict water flow. Upgrade your faucet with a new aerator for a refreshing, unrestricted flow. Non-splashing 18.5 mm / 0.73 inch plug-in flow restrictor: Makes your water use more efficient. Designed with an 18.5 mm / 0.73 inch plug-in flow restrictor. High-quality ABS material: Faucet aerator and removal wrench are made of ABS plastic, durable and reusable for long-term use. Package includes: 6 pieces of 18.5 mm / 0.73 inch faucet aerator replacement parts and 2 disassembly wrench tools. Easy to install: This product includes replaceable aerators and a disassembly wrench tool. No professional tools or skills required. Can be easily installed to replace the original filter on your bathroom or kitchen faucet.