Expandable Air Media Filter 88NA2506MB01 MERV 10 for Bryant and Carrier Fits Bryant electronic air cleaner models: 31MF020, 31MF120, 31MF02001, 31MF020100, 902B, and 902BXX020-A Filters out 97% of airborne particles Removes dust, pollen, molds, tobacco smoke, grease, soot, bacteria, animal Size: 25 1/16" x 6 5/16" Replace every 6 - 12 months based on usage