17 1/2" x 35" x 1" MERV 11 - Ultra Allergen Reducing Pleated Air Filter - 6 Pack MERV 11 - Pleated Air Filter:17 1/2" x 35" x 1" MERV 11 - Pleated Air Filter They help capture airborne particles/allergens

They help capture airborne particles/allergens between 3-10 microns in size and are an ideal upgrade from standard disposable panel filters

13" x 21" x 1" MERV 8 - Premium Pleated Air Filter - 6 Pack

25" x 25" x 2" MERV 8 - Premium Pleated Air Filter - 6 Pack

15 1/2" x 21 1/2" x 1" MERV 8 - Premium Pleated Air Filter - 6 Pack

17 1/2" x 35" x 1" MERV 11 - Ultra Allergen Reducing Pleated Air Filter - 6 Pack MERV 11 - Pleated Air Filter:17 1/2" x 35" x 1" MERV 11 - Pleated Air Filter They help capture airborne particles/allergens17 1 2" x 35" x 1" MERV 11 Pleated Air Filter 6 Pack Actual Dimensions: 17 1 2" x 35" x 3 4" Filtration Group's High Capacity MERV 11 air filter is made of 100% Synthetic Media which will not promote mold or bacteria growth and has the following features: MERV 11 efficiency, UL Classified, LEED point certification, 100% recycled paperboard frame, low resistance to air flow minimizes energy costs, 100% synthetic media is moisture resistant, valuable