Niagara's patented non-removable Pressure Compensated Dual-Thread Needle Spray Bathroom aerators are an innovative water-saving solution designed to accommodate both male and female applications. Niagara's faucet aerators save money on water and energy by producing forceful streams at a reduced flow rate that minimizes the amount of energy needed to heat hot water. They feature solid-brass housing with a polished chrome finish and a 10-year guarantee.