Check the listing for details. Vertex Water Machine EasyPur RO Filter Kit (Membrane Sold Separately). Condition: New. Listed at 76.96 USD. Filter Replacement Kit for Vertex WaterMachine EasyPur Reverse Osmosis System (RO Membrane Sold Separately) INCLUDES: * STAGE 1 - 1x Sediment Pre-Filter (Q5605)* - Replace every 6-12 months or as needed * STAGE 2 - 1x Carbon Block Pre-Filter (Q5621)* - Replace every 6-12 months or as needed * STAGE 3 - 0x RO Encapsulated Membrane MH-4206 Sold Separately or with Replacement Kit YSM-VEREP) - Replace every 24 months * STAGE 4 - 1x Carbon Block Post Filter (Q5621)* - Replace every 6-12 months or as needed * STAGE 5 - 1x Inline Carbon GAC Post Filter 2" x 10" (CL10ROT33-BB) - Replace every 6-12 months or as needed Filters may need to be replaced more often than indicated depending on water contaminant levels and volume of water being treated. *Q Series Filters are 12" in Length and not 10" like the original filters in the EasyPur Reverse Osmosis System.