Check the listing for details. 4 inline Filter Set for Countertop RO Reverse Osmosis System, incl DI bed. Condition: New. Listed at 49.99 USD. 1 Universal Set (4 filters) for 5-stage Ultrapure Countertop Reverse Osmosis Systems OVERVIEW: Total filters: 4 1-st stage: Inline Sediment Filter 2"x10" 5 Micron, Made in Taiwan.2-nd stage: Inline Granular Activated Carbon T28 Carbon Pre-Filter 2"x10", NSF Certified, made in USA.Membrane (not include in package - change every 2-3 years).4-th stage: Inline DI Mixed Bed Filter 2"x10", NSF Certified, made in USA5-th stage: Premium Coconut Carbon Post filter, 2"x10", NSF Certified Specification: Specification:Type5M SedimentPurpose:Remove sand, silt, dirt and rust particlesDiameter2"Fitting1/4" femaleService life2.500 GalLength10"StageFirstHousingClearSKUIL-10SC-S514 Type:T28 GAC pre-filterPurrpose:Remove chlorine, chloromine, aluminum, cyanide, nitrates, cysts, pesticides, VOC. Also improve test and water color & odor reductionDiameter2"Fitting1/4" femaleService life1.500 Gal or 6-8 monthsLength:10"StageSecondHousingWhiteMan. SKUCL10ROT28Carbon TypeT28 , Standard Coconut Shell GAC Type:DI Beds FilterPurpose:Ion Exchange Process for ultra-high purity water with a minimum TOC background. Decrease level TDS to 0-2 PPMDiameter2"Fitting1/4" femaleService life6-12 monthsLength:10"StageLast HousingWhite or GreenMan. SKUK2555-BB or H-F1035ADIC (replacement)TypeMixed bed DI (Deionizing) resin Type:Premium Coconut Post filter improve test and water color & odor reductionPurpose:Diameter2"Fitting1/4" femaleService life6-12 monthsLength:10"StageLast or before T33 post filterHousing Shipping (USA and International): We ship within 2 business day via USPS First Class/Priority Mail. Returns/Exchange: Within 15 days. Only if filters was never used and still have sealed package. Warranty: Warranty: 30 days