Do it Low Lead Duo-Fit Water Saver Faucet Aerator fits faucets with 55/64" x 27 tpi outside threads or 15/16" x 27 tpi inside threads, providing efficient water flow control at 2.0 gallons per minute. This aerator is manufactured to ensure no more than 0.25% weighted average lead content on wetted surfaces, promoting safer water use. Available in chrome-plated, polished brass, and antique brass finishes, it is crafted from durable brass material. The connection features 15/16"-27 female by 55/64"-27 male threading, making it versatile and easy to install for various faucet types. This product combines functionality with style, helping you conserve water without sacrificing performance.