Clear Choice CLCH100 Refrigerator Water Filter Whirlpool Filter Replacement Cost-Effective Alternative to Factory Original Nsf 42: System tested and certified by iapmo against nsf/ansi standard 42 for the reduction of chlorine taste and odor 6 month/400 gallon filter removes chlorine, odor, contaminants and particulate Compatible with refrigerators by Maytag, whirlpool, kitchen aid, Amana, thermoform, and other models Replaces part numbers: 4396508, l400, l500, 9908, filter 5 and others Made in the USA