Check the listing for details. iSpring RCC7AK Compatible Filter Kit 75 GPD Membrane. Condition: New. Listed at 120.94 USD. 1-Year Compatible Filter Change Kit with RO Membrane for iSpring RCC7AK and RCC7P-AK 6-Stage Alkaline Reverse Osmosis System INCLUDES: * STAGE 1 - 1x Sediment Pre-Filter (93023) - Replace every 6-12 months or as needed * STAGE 2 - 1x Carbon GAC Pre-Filter (OCB934RO T33) - Replace every 6-12 months or as needed * STAGE 3 - 1x Carbon Block Pre-Filter (OMB934-5m) - Replace every 6-12 months or as needed * STAGE 4 - 1x RO Membrane TLC 75 GPD (555693-00) - Replace every 24 months * STAGE 5 - 1x Inline Carbon Post Filter 2" x 10" (K2533-JJ) - Replace every 6-12 months or as needed * STAGE 6 - 1x Remineralization Post Filter 2" x 10" (K2548-JJ) - 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.