18" x 30" x 1" MERV 11 - Ultra Allergen Reducing Pleated Air Filter - 6 Pack 31-5w 12" x 20" x 2"

12" x 20" x 2" Permanent Washable Air Filter - 1 Pack

21 1/4" x 22" x 1" MERV 8 - Premium Pleated Air Filter - 6 Pack

Actual Dimensions: 7 3/4" x 21 3/4" x 3/4"

13 3/4" x 23 3/4" x 1" MERV 8 - Premium Pleated Air Filter - 6 Pack

18" x 30" x 1" MERV 11 - Ultra Allergen Reducing Pleated Air Filter - 6 Pack 31-5w 12" x 20" x 2"18" x 30" x 1" MERV 11 Pleated Air Filter 6 Pack Actual Dimensions: 17 3 4" x 29 3 4" 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