Check the listing for details. 4 inline Filter Set for Countertop RO Reverse Osmosis System, inc DI and KDF. Condition: New. Listed at 58.99 USD. 1 Universal Set (4 filters) for 5-stage Antibacterial Countertop RO Systems, including Sediment, T28, DI filter close to 0ppm and antibacterial K2567-BB inline filter cartridges 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 KDF-55/T33 post filter 2"x10", NSF Certified, made in USA 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:KDF-55 /T33, PremoumPurpose:Antibacterial Post filterDiameter2"Fitting1/4" femaleService life6-12 monthsLength:10"StageLast or before T33 post filterHousingWhiteMan. SKUK2567-BBType KDF-55 + T33 carbon 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