Aries AF-20-3622-BB Organic/Tannin 20" BB Speciality Filter AF Series Specialty Drinking Water cartridges utilize premium ion exchange resins and specialty absorbents to remove a wide variety of contaminants. Features Benefits: Used for Tannins/Organics removal AF series cartridges are double-open end that fit standard residential industrial housings Made in the U.S.A. High purity ResinTech Resins Specialty Adsorbents Highest total capacity Fits standard and slim style housings Lot traceability Body materials FDA approved Technical Data: Diameter (in.): 4.5 Length (in.): 20 Cap Material: ABS Body/Tube Material: ABS Pad Material: Polyester Gasket Material: EPDM Temperature F (min/max): 40/90 Pressure (psi) (min/max): 20/125 Micron Rating: 25 Specifications: Size: 4.5" x 20" Flow Rate (GPM) Operating: 0.5 Gallons: 665 Water Quality Guidelines: Arsenic: 50 ppb Conductivity: 1000 micromhos/cm pH: 6.0 - 8.0 Silica: 10 ppm Sulfate: 100 ppm Phosphate: 5 ppm Chlorine: 0.3 ppm Turbidity: 5 NTU