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18" x 24" x 1" Permanent Washable Air Filter - 1 Pack
Actual Dimensions: 20 7/8" x 22 7/8" x 3/4"
Unlike disposable filters made with sharp metal
21 1/4" x 21 1/4" x 1" MERV 6 - Fiberglass Air Filter - 6 Pack
14" x 14" x 1" MERV 4 - Residential Washable Air Filter 23w 18" x 24" x 1"14" x 14" x 1" MERV 4 Residential Washable Air Filter 1 Pack Actual Dimensions: 14" x 14" x 3 4 These quality filters are built to last a lifetime. They are interchangeable with 1" disposable filters and can be used again and again. The secret behind the filter's performance is its patented stage loading peak and valley design. Instead of face loading (particles captured on the outer surface of the filter) the filter uses stage loading, with each
