19 3/4" x 21 1/4" x 1" MERV 11 - Ultra Allergen Reducing Pleated Air Filter - 6 Pack 18-125w degrade and restrict air flow

degrade and restrict air flow

expanded metal grid

Actual Dimensions: 23 3/8" x 23 3/8" x 1 3/4"

17 1/4" x 27" x 1" MERV 8 - Premium Pleated Air Filter - 6 Pack

19 3/4" x 21 1/4" x 1" MERV 11 - Ultra Allergen Reducing Pleated Air Filter - 6 Pack 18-125w degrade and restrict air flow19 3 4" x 21 1 4" x 1" MERV 11 Pleated Air Filter 6 Pack Actual Dimensions: 19 3 4" x 21 1 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,