12 1/2" x 21" x 1" MERV 11 - Ultra Allergen Reducing Pleated Air Filter - 6 Pack 4-inch-air-filters 14" x 25" x 4"

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11 1/2" x 29 1/2" x 1" MERV 11 - Pleated Air Filter - 6 Pack

20" x 22" x 1" MERV 6 - Fiberglass Air Filter - 6 Pack

12 1/2" x 21" x 1" MERV 11 - Ultra Allergen Reducing Pleated Air Filter - 6 Pack 4-inch-air-filters 14" x 25" x 4"12 1 2" x 21" x 1" MERV 11 Pleated Air Filter 6 Pack Actual Dimensions: 12 1 2" x 21" x 3 4" Filtration Group's High Capacity MERV 11 air filter is made of 100% Synthetic Media which will not promote mold or bacteria growth and has the following features: MERV 11 efficiency, UL Classified, LEED point certification, 100% recycled paperboard frame, low resistance to air flow minimizes energy costs, 100% synthetic media is moisture resistant, valuable