Introducing Valuetrex's new reverse osmosis membranes. Valuetrex membranes fits most standard residential reverse osmosis housings and are at an affordable price. Specifications:Dimensions: 1.8" Diameter x 11.75" LengthWeight: 10 ozFits most conventional unitsMembrane Life: 2-5 yearsOperating Pressure: 40 psi to 100 psiOperating Temperature: 40-100 F