Replacement MERV 11 filter for the Ultra-Aire 100V, XT105H, XT155H, XT205H and SD12 dehumidifiers. Case of 6. These MERV 11 filters are made to the same rating as the original equipment products. Filters are 100% synthetic graduated density media. They are continuously bonded to a 30 gauge galvanized, corrosion resistant, expanded metal support grid with an effective open area of 96%. The media is resistant to a wide range of chemicals, does not absorb moisture and will not support microbial growth. The controlled pleat spacing maximizes surface area and dust holding capacity and is bonded to the enclosure frame to prevent dust bypass. The enclosure frame is constructed of high wet strength moisture resistant beverage board. The diagonal support members of the frame are bonded to the entering and exiting apexes of each pleat to prevent pleat collapse and filter bowing.