18" x 25" x 4" MERV 13 - Ultimate Allergen Reducing Pleated Air Filter - 6 Pack MERV 13 - Pleated Air Filter:18" x 25" x 4" MERV 13 - Pleated Air Filter Actual Dimensions: 17 3/4" x

Actual Dimensions: 17 3/4" x 35 3/4" x 3/4"

21 1/4" x 21 1/4" x 4" MERV 13 - Pleated Air Filter - 6 Pack

12 3/4" x 26" x 1" MERV 8 - Premium Pleated Air Filter - 6 Pack

Actual Dimensions: 15 1/2" x 21 1/2" x 3/4"

18" x 25" x 4" MERV 13 - Ultimate Allergen Reducing Pleated Air Filter - 6 Pack MERV 13 - Pleated Air Filter:18" x 25" x 4" MERV 13 - Pleated Air Filter Actual Dimensions: 17 3/4" x18" x 25" x 4" MERV 13 Pleated Air Filter 6 Pack Actual Dimensions: 17 7 8" x 24 7 8" x 3 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