Highly Fluorinated water may be dangerous to your health. Drinking water with fluoride levels above 2 mg/L can lead to mottling of the teeth. Ongoing levels above 4 mg/L can result in serious health problems. Although the main purpose of this filter is to remove fluoride, Activated Alumina can remove many other contaminants. Reduces/Removes: Fluoride Hydrogen Chloride Hydrogen Sulfide Carbonyl Sulfide Carbon Dioxide Inorganic Arsenic Alcohols Ethers Specifications: Micron Rating: 10 Micron Dimensions: 20" x 2.5" Design Flow Rate: .25 GPM Weight: 2 lbs 4 oz Operation Temperature: 40�F to 100�F Filter Media: Activated Alumina Filter Life: 12,000 mg/L or 701 GPG Operating Conditions: For maximum effectiveness, do not exceed the recommended flow rate of .25 GPM. This filter lasts for 12,000 mg/l (ppm) with effluent levels below 0.2 ppm from 10 ppm feed (approximately 2750 gallons). Note: high pH and high bicarbonate levels reduce the capacity - above 100 ppm bicarbonate, reduce by 50%; above 200 ppm, reduce by 75%. Interfering ions and the recommended flow rates must be specifically accounted for when sizing these cartridges.