20" x 21 3/4" x 1" MERV 13 - Ultimate Allergen Reducing Pleated Air Filter - 6 Pack MERV 13 - Pleated Air Filter:20" x 21 3/4" x 1" MERV 13 - Pleated Air Filter 19 5/8" x 29 5/8"

19 5/8" x 29 5/8" x 1" MERV 8 - Premium Pleated Air Filter - 6 Pack

16" x 24" x 2" Permanent Washable Air Filter - 1 Pack

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

and it can be used either dry or coated with filter adhesive

13 1/8" x 21 5/8" x 1" MERV 8 - Premium Pleated Air Filter - 6 Pack

20" x 21 3/4" x 1" MERV 13 - Ultimate Allergen Reducing Pleated Air Filter - 6 Pack MERV 13 - Pleated Air Filter:20" x 21 3/4" x 1" MERV 13 - Pleated Air Filter 19 5/8" x 29 5/8"20" x 21 3 4" x 1" MERV 13 Pleated Air Filter 6 Pack Actual Dimensions: 20" x 21 3 4" 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