21" x 23" x 1" MERV 13 - Ultimate Allergen Reducing Pleated Air Filter - 6 Pack 31-75w 20" x 22 1/4" x

20" x 22 1/4" x 4" MERV 13 - Pleated Air Filter - 6 Pack

Actual Dimensions: 12 1/2" x 24 1/2" x 3 3/4"

24" x 36" x 1" Permanent Washable Air Filter - 1 Pack

Actual Dimensions: 21 1/2" x 23 3/8" x 3 3/4"

This design enables the filter to maintain its performance over the years

21" x 23" x 1" MERV 13 - Ultimate Allergen Reducing Pleated Air Filter - 6 Pack 31-75w 20" x 22 1/4" x21" x 23" x 1" MERV 13 Pleated Air Filter 6 Pack Actual Dimensions: 20 7 8" x 22 7 8" x 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