PurePro Membranes are made in USA. High rejection TFC type membrane with the capacity of producing 50 gallons per day. This membrane removes the following hard water contaminants that may be present in your water: lead, cooper, barium, chromium, mercury, sodium, cadmium, fluoride, nitrite, nitrate, and selenium. This filter is suitable for the AquaRosa Essential / PurePro RO105.