20" x 22 1/4" x 4" MERV 13 - Ultimate Allergen Reducing Pleated Air Filter - 6 Pack MERV 13 - Pleated Air Filter:20" x 22 1/4" x 4" MERV 13 - Pleated Air Filter 14" x 30" x 1"

14" x 30" x 1" Permanent Washable Air Filter - 1 Pack

Actual Dimensions: 12" x 36" x 1 3/4

Actual Dimensions: 18 3/4" x 21 3/4" x 3/4"

16" x 18" x 1" MERV 4 - Residential Washable Air Filter - 1 Pack

10" x 10" x 1" MERV 4 - Residential Washable Air Filter - 1 Pack

20" x 22 1/4" x 4" MERV 13 - Ultimate Allergen Reducing Pleated Air Filter - 6 Pack MERV 13 - Pleated Air Filter:20" x 22 1/4" x 4" MERV 13 - Pleated Air Filter 14" x 30" x 1"20" x 22 1 4" x 4" MERV 13 Pleated Air Filter 6 Pack Actual Dimensions: 19 7 8" x 22 1 4" x 3 3 4" Filtration Group's High Capacity MERV 13 air filter is made of 100% Synthetic Media which will not promote mold or bacteria growth and has the following features: MERV 13 Efficiency, LEED compliant, High Efficiency in 2" depth, Advanced media incorporating both charged fibers and traditional mechanical principles, 100% recycled paperboard frame, Easy