FILMTEC reverse osmosis membrane elements for home drinking water are the industry' 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. FILMTEC elements are shipped dry for convenient handling and long shelf-life. These elements are NSF/ANSI Standard 58 listed. FILMTEC home drinking water elements are rated at 50 psi and will purify about 20% more water than competitive elements rated at 60 psi. Specifications: Dimensions: 1.8" Diameter x 12" Length Weight: 15 oz Fits most conventional units Membrane Life: 2-5 years Operating Pressure: 40 psi to 145 psi Operating Temperature: 40-100 F