Omnipure's CSM Series high quality carbon block filter fits several popular reverse osmosis systems by Water Factory Systems / 3M Purification / 3M Water Filtration. These systems are typically located under-the-sink and produce pure, high quality water for drinking and cooking. The sanitary quick change (SQC) system offers very easy filter change-out (just twist 1/4 turn) and eliminates the need to handle the filter media. This filter acts as a post-filter and removes chlorine, bad tastes, and other contaminants from the water before it is dispensed. Specifications: Micron Rating: 5 microns Dimensions: 13.5" X 2.5" Replace every 6-12 months Reduces sediment and chlorine, taste, and odor