The OmniFilter OM1 Replacement Reverse Osmosis Membrane is used on Omnifilter models RO2000 and RO2000-TDS. The OmniFilter OM1 reverse osmosis membrane has the following specifications Output - 7 Gallons per day Maximum water pressure - 100 PSI Minimum water pressure - 40 PSI This product was known previously as model numbers OM1-S-02 and OM1-S-03 and is now known by model number OM1-S4-05.