20" x 21" x 2" MERV 13 - Ultimate Allergen Reducing Pleated Air Filter - 6 Pack MERV 13 - Pleated Air Filter:20" x 21" x 2" MERV 13 - Pleated Air Filter 11 1/8" x 23 3/8"

11 1/8" x 23 3/8" x 1" MERV 8 - Premium Pleated Air Filter - 6 Pack

30" x 30" x 4" MERV 13 - Pleated Air Filter - 6 Pack

9 1/8" x 9 1/8" x 1" MERV 8 - Premium Pleated Air Filter - 6 Pack

This filter is constructed using a MERV 6

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

20" x 21" x 2" MERV 13 - Ultimate Allergen Reducing Pleated Air Filter - 6 Pack MERV 13 - Pleated Air Filter:20" x 21" x 2" MERV 13 - Pleated Air Filter 11 1/8" x 23 3/8"20" x 21" x 2" MERV 13 Pleated Air Filter 6 Pack Actual Dimensions: 19 7 8" x 20 7 8" x 1 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