Check the listing for details. 4pcs replacement inline filter set portable Reverse Osmosis plus 75 GPD membrane. Condition: New. Listed at 39.99 USD. 1 Universal Set (3 inline filters) and 75 GPD Membrane for 4-stage Countertop Reverse Osmosis Systems, made in USA OVERVIEW: Total filters: 3 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. 3-rd stage: Membrane 75 GPD, made in USA. 4-th stage: Inline Granular Activated Carbon T33 Carbon Filter 2"x10", NSF Certified 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 Second Housing White Man. SKU CL10ROT28 Carbon Type T28 , Standard Coconut Shell GAC Type: T33 Polishing GAC filter 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 White Man. SKU H-F1032-43A or CLIORO T33 Carbon Type T33 , Acid Wash Coconut Shell GAC Elements and the Percent Membranes will remove % of removal Arsenic 93%-96% Aluminum 86%-90% Bicarbonate 90% Cyanide 85%-93% Chloride 85%-92% Calcium 94%-98% Sodium 86.5%-93% Sulfate 96%-98% Potassium 84%-95% Barium 95%-98% Iron 94%-98% Nitrate 60%-76% Mercury 94%-98% Zink 95%-98% Selenium 94%-96% Lead 95%-98% Phosphate 94%-98% Magnesium 94%-98% Fluoride 82%-92% Nickel 96%-98% Cadmium 94%-98% Detergent 97%-98% Herbicides 97%-98% Insectecides 97%-98% Strontium 96% Shipping: We ship within 1-business day via USPS Priority Mail. Returns/Exchange: Only if product is defected. Warranty: Warranty: 15 days