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21 1/2" x 23 3/8" x 1" MERV 4 - Residential Washable Air Filter - 1 Pack
Actual Dimensions: 20" x 21" x 3/4
12" x 20" x 1" MERV 4 - Residential Washable Air Filter - 1 Pack
18" x 22" x 1" MERV 6 - Fiberglass Air Filter - 6 Pack
14" x 36" x 1" Permanent Washable Air Filter - 1 Pack
20" x 20" x 12" 85% No Header Rigid Filter Commercial Rigid Box Filter Galvanized Rigid Box Filter:20" x 20" x 12 85% No Header Rigid Filter 21 1/2" x 23 3/8"20" x 20" x 12" 85% No Header Rigid Filter 1 Pack 20" x 20" x 12" 85% No Header Rigid Filter The Filtration Group Rigid Air Filter is a steel cased air filter engineered to provide medium and high efficiency filtration combined with a prolonged life cycle. Its box filter construction eliminates the need for retainer and special external wire media supports. The perimeter frame is constructed of high strength, corrosion resistant galvanized steel.
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