9 1/2" x 13 1/2" x 1" MERV 11 - Ultra Allergen Reducing Pleated Air Filter - 6 Pack 29-75w 20" x 21" x 4"

20" x 21" x 4" MERV 11 - Pleated Air Filter - 6 Pack

Chemically Treated:

030" thick 3003 H-14 aluminum frame to enclose the filter media pack

Actual Dimensions: 10" x 26" x 3/4"

9 1/2" x 13 1/2" x 1" MERV 11 - Ultra Allergen Reducing Pleated Air Filter - 6 Pack 29-75w 20" x 21" x 4"9 1 2" x 13 1 2" x 1" MERV 11 Pleated Air Filter 6 Pack Actual Dimensions: 9 1 2" x 13 1 2" 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,