16 1/2" x 21" x 1" MERV 8 - Premium Pleated Air Filter - 6 Pack 29-5l Actual Dimensions: 16 1/2" x

Actual Dimensions: 16 1/2" x 27 1/2" x 3/4"

21" x 21" x 4" MERV 11 - Pleated Air Filter - 6 Pack

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

expanded metal grid

18" x 30" x 1" Permanent Washable Air Filter - 1 Pack

16 1/2" x 21" x 1" MERV 8 - Premium Pleated Air Filter - 6 Pack 29-5l Actual Dimensions: 16 1/2" x16 1 2" x 21" x 1" MERV 8 Premium Pleated Air Filter 6 Pack Actual Dimensions: 16 1 2" x 21" x 3 4" Filtration Group's pleated air filter is made of 100% Synthetic Media which will not promote mold or bacteria growth and has the following features: MERV 8 efficiency, UL Classified, LEED point certification, 100% recycled paperboard frame, low resistance to air flow minimizes energy costs, 100% synthetic media is moisture resistant, no electrostatic