16 1/8" x 21" x 1" MERV 13 - Ultimate Allergen Reducing Pleated Air Filter - 6 Pack Washable Air Filter1m 20" x 30" x 1"

20" x 30" x 1" MERV 6 - Fiberglass Air Filter - 6 Pack

20" x 34" x 1" Permanent Washable Air Filter - 1 Pack

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

20" x 21 1/2" x 1" MERV 6 - Fiberglass Air Filter - 6 Pack

16 1/8" x 21" x 1" MERV 13 - Ultimate Allergen Reducing Pleated Air Filter - 6 Pack Washable Air Filter1m 20" x 30" x 1"16 1 8" x 21" x 1" MERV 13 Pleated Air Filter 6 Pack Actual Dimensions: 16 1 8" x 21" 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