Check the listing for details. 4 inline Filter Set for Countertop RO Reverse Osmosis System, assembly. Condition: New. Listed at 81.99 USD. Assembly 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: Inline DI Mixed Bed Filter 2"x10", NSF Certified, made in USA Comes as assembly with tubing, fitting, and membrane housing attached. Need to insert membrane from old unit. Specification: Specification:Type5M SedimentPurpose:Remove sand, silt, dirt and rust particlesDiameter2"Fitting1/4" femaleService life2.500 GalLength10"StageFirstHousingClearSKUH-F1033-40A 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: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 or before T33 post filterHousingGreenMan. SKUH-F1035ADIC (replacement)TypeMixed bed DI (Deionizing) resin 2/3, T33 carbon 1/3 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