16 1/2" x 21 1/2" x 4" MERV 11 - Ultra Allergen Reducing Pleated Air Filter - 6 Pack MERV 11 - Pleated Air Filter:16 1/2" x 21 1/2" x 4" MERV 11 - Pleated Air Filter 16" x 21" x 1"

16" x 21" x 1" MERV 8 - Premium Pleated Air Filter - 6 Pack

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

20 1/2" x 22" x 1" MERV 8 - Premium Pleated Air Filter - 6 Pack

Factory made to fit with no hassles or problems cutting and sizing adjustable filters

21" x 23" x 1" MERV 4 - Residential Washable Air Filter - 1 Pack

16 1/2" x 21 1/2" x 4" MERV 11 - Ultra Allergen Reducing Pleated Air Filter - 6 Pack MERV 11 - Pleated Air Filter:16 1/2" x 21 1/2" x 4" MERV 11 - Pleated Air Filter 16" x 21" x 1"16 1 2" x 21 1 2" x 4" MERV 11 Pleated Air Filter 6 Pack Actual Dimensions: 16 1 2" x 21 1 2" x 3 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,