WATTS reverse osmosis membrane elements for home drinking water are the industry's most reliable. Advanced membrane technology and automated fabrication allow these elements to deliver consistent performance that equipment suppliers, water treatment dealers, and residential customers can rely on. WATTS elements are shipped dry for convenient handling and long shelf-life. These elements are NSF/ANSI Standard 58 listed. Specifications:Dimensions: 1.8" Diameter x 11.75" LengthWeight: 10 ozFits most conventional unitsMaximum Pressure: 125 psiMaximumTemperature: 125 FSalt Rejection : 96%