21 1/2" x 22 1/2" x 1" MERV 11 - Ultra Allergen Reducing Pleated Air Filter - 6 Pack MERV 11 - Pleated Air Filter:21 1/2" x 22 1/2" x 1" MERV 11 - Pleated Air Filter assembled in a criss-cross fashion

assembled in a criss-cross fashion for strength

16" x 25" x 4" MERV 13 - Pleated Air Filter - 6 Pack

Actual Dimensions: 9 1/2" x 19 1/2" x 1 3/4"

10" x 20" x 1" MERV 13 - Pleated Air Filter - 6 Pack

27 1/2" x 29 1/2" x 1" MERV 8 - Premium Pleated Air Filter - 6 Pack

21 1/2" x 22 1/2" x 1" MERV 11 - Ultra Allergen Reducing Pleated Air Filter - 6 Pack MERV 11 - Pleated Air Filter:21 1/2" x 22 1/2" x 1" MERV 11 - Pleated Air Filter assembled in a criss-cross fashion21 1 2" x 22 1 2" x 1" MERV 11 Pleated Air Filter 6 Pack Actual Dimensions: 21 1 2" x 22 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,