Refrigerator Water Filter (1-Pack) Efficient Contaminants Reduction---Chlorine taste, odor, sediment, dirt, rust,turbidity,heavy metals and harmful sediments will be furthest reduced by activated carbon. Create better tasting water for drinking and making beverages with clearer, purer, healthier ice. High grade carbon block, that removes over 99 percent of numerous potentially harmful contaminants which may be present in your water. Regular Replacement:For the best filtration results, please replace the filter every 6 months or 200 gallons to maximize contaminant reduction. If not satisify with it, simply return it and get the money back. Very easy to install, tools free.