This IPW Industries Inc. set is compatible with OmniFilter ROR2000. These filters fit the OmniFilter RO2000 Series B Reverse Osmosis System. These filters reduce cysts, rust, sediment, and the taste and odor of Chlorine. The Omni Filter ROR2000 set contains a compatible OmniFilter RS4 5 Micron polyspun cartridge and a compatible OmniFilter CB1 0.5 Micron carbon block cartridge. The Omnifilter RS2 compatible, which is sold separately, can be used in place of the RS4 in the OmniFilter RO2000. OmniFilter ROR2000 Product Specifications: Filter Capacity: 15,000 gallons or three months Min. / Max. Water Temperature: 40-100 F Min. / Max. Water Pressure: 40-199 psi This product was known previously as model number ROR2000-01 and is now known by model number ROR2000-S-05. These filters are compatible with the Omni filters.