27 1/2" x 27 1/2" x 1" MERV 13 - Ultimate Allergen Reducing Pleated Air Filter - 6 Pack 9-5l Actual Dimensions: 18 1/2" x

Actual Dimensions: 18 1/2" x 18 1/2" x 3/4"

16" x 21" x 4" MERV 8 - Premium Pleated Air Filter - 6 Pack

Actual Dimensions: 17 1/4" x 21 1/4" x 3/4"

The corners are mitered and the frame is secured with pop rivet(s)

14" x 18" x 1" Permanent Washable Air Filter - 1 Pack

27 1/2" x 27 1/2" x 1" MERV 13 - Ultimate Allergen Reducing Pleated Air Filter - 6 Pack 9-5l Actual Dimensions: 18 1/2" x27 1 2" x 27 1 2" x 1" MERV 13 Pleated Air Filter 6 Pack Actual Dimensions: 27 1 2" x 27 1 2" 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