Additional Details ------------------------------ Product description: Compatible Reverse Osmosis Membrane to Replace or an alternative for a Omnipure/PuROTwist TQ56-50FC Reverse Osmosis Membraneis also know as and can be a replacement for the following Reverse Osmosis Filters: PuROTwist TQ56-36FC Reverse Osmosis Membrane, PuROTwist TQ56-50FC Reverse Osmosis Membrane. PuROTwist TQ56-50FC Reverse Osmosis Membrane, can be used in the following Reverse Osmosis Systems/Machines: TQ5672 PuROTwist 3000 Gold Series Easy Change Reverse Osmosis System, PuROTwist 4000 Gold Series Easy Change Reverse Osmosis System. Compatible Reverse Osmosis Membrane to Replace or an alternative for a Omnipure/PuROTwist TQ56-50FC Reverse Osmosis Membrane can also fit some RO systems by Farris, TGI, ARS, IWW.