Check the listing for details. 3pcs portable Reverse Osmosis RO replacement filter set,sediment,T28 & Alkaline. Condition: New. Listed at 39.99 USD. 1 Universal Set (3 filters) for 4-stage Reverse Osmosis Systems, made in USA OVERVIEW: Quantity of 1. Total filters: 3 1-st stage: Inline Sediment Filter 2"x10" 5 Micron 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). 3-rd stage: 3-in1 Alkaline, ORP + Tourmaline Media filter cartridge Specification: Type 5M Sediment Purpose: Remove sand, silt, dirt and rust particles Diameter 2" Fitting 1/4" female Service life 2.500 Gal Length 10" Stage First Housing Clear SKU IL-10SC-S514 Type: T28 GAC pre-filter Purrpose: Remove chlorine, chloromine, aluminum, cyanide, nitrates, cysts, pesticides, VOC. Also improve test and water color & odor reduction Diameter 2" Fitting 1/4" female Service life 1.500 Gal or 6-8 months Length: 10" Stage Sedond Housing White Man. SKU CL10ROT28 Carbon Type T28 , Standard Coconut Shell GAC Type: Alkaline+ORP Purpose: Efficient removal of chlorine, chloramine and organic chemicals. Also improve test, water color & odor reduction Diameter 2" Fitting 1/4" female Service life 1.500 Gal or 6-8 months Length: 10" Stage Last Housing Semiclear Man. SKU Carbon Type Shipping (US): We ship within 1 business day via USPS Priority Class Mail. Shipping (International): We ship within 2 business day via USPS International Priority Mail. Returns/Exchange: Within 30 days. Customer is responsible for shipping. Filters must be sealed and unused.