The Culligan Compatible CTA-16-C Reverse Osmosis Membrane is a 16 gallon per day membrane made by Desal that is excellent for extending the life of your system, while producing great tasting water that is clean and healthy. The CTA-16-C can be used in several RO systems, including the Culligan H5 and H53 RO systems. Features: 16 Gallons Per DayFilter Life: 2-3 yearsMade in the USAAlso Known As: CTA-16C, 00-4428-45, 01-0001-45, M-C1812C10 Specifications: Permeate Flow @ 65 PSI: 10 - 16 gpdAverage NaCl Rejection: 85 %Dimensions: Length 12 1/4 ", Diameter 2 1/4 "Membrane Style: Drop-in Element