The RE2521-BLF commercial RO membrane is widely-used to treat brackish water within 10,000 ppm of concentration. Applications include producing drinking water, pharmaceutical water, industrial water, concentration of food and/or medicine and waste water treatment.SpecificationsFlow Rate: 400 Gallons Per DayDimensions: 21" X 2.5"Replace every 24 monthsThin Film Membrane (TFM)NSF Certified