Best Choice Water Filters will provide you with high quality drinking water and Ice for up to 6 months. Coconut carbon media reduces the many contaminants found in tap water. Reduces Class 1 particulates down to .52 microns. Designed to meet or exceed original equipment filtration standards. Filters have been tested to comply with NSF/ANSI standard 42 for the reduction of chlorine tastes and odors. Best Choice Filters offer Premium Certified and Tested Quality at a discounted price. Quality water you can count on for 6 months. Compatible with: E402B, E442B, E522B, and RF90A180DU model refrigerators