21 1/2" x 21 1/2" x 1" Commercial Washable Air Filter Commercial Washable Air Filter:21 1/2" x 21 1/2" x 1" Permanent Washable Air Filter 18" x 30" x 1"

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

Actual Dimensions: 16" x 25" x 1 3/4

Actual Dimensions: 19 3/4" x 21 3/4" x 3/4"

18" x 36" x 1" MERV 6 - Fiberglass Air Filter - 6 Pack

21 1/2" x 21 1/2" x 1" Commercial Washable Air Filter Commercial Washable Air Filter:21 1/2" x 21 1/2" x 1" Permanent Washable Air Filter 18" x 30" x 1"21 1 2" x 21 1 2" x 1" Permanent Washable Air Filter 1 Pack Actual Dimensions: 21. 5" x 21. 5" x 3 4 The washable type industrial grade filter is built to withstand frequent and moderate cleanings. An aluminum frame Filtration Group filter is the lightest weight filter in the industrial grade class. It is designed for use in commercial and industrial applications to filter air, grease and coolant mists, and it can be used either dry or coated with