12" x 21" x 1" MERV 13 - Ultimate Allergen Reducing Pleated Air Filter - 6 Pack 8-25l 11 1/2" x 23 1/2"

11 1/2" x 23 1/2" x 1" MERV 8 - Premium Pleated Air Filter - 6 Pack

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

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

19 1/2" x 29 1/4" x 1" MERV 13 - Pleated Air Filter - 6 Pack

expanded metal grid

12" x 21" x 1" MERV 13 - Ultimate Allergen Reducing Pleated Air Filter - 6 Pack 8-25l 11 1/2" x 23 1/2"12" x 21" x 1" MERV 13 Pleated Air Filter 6 Pack Actual Dimensions: 12" 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 installation