20" x 20" x 12" 65% With Header Rigid Filter Commercial Rigid Box Filter 27-75l Actual Dimensions: 21 1/2" x

Actual Dimensions: 21 1/2" x 23" x 3/4"

UL Classified

Actual Dimensions: 19 1/2" x 24 1/2" x 3/4"

12" x 24" x 1" MERV 6 - Fiberglass Air Filter - 6 Pack

Actual Dimensions: 10" x 16" x 3/4

20" x 20" x 12" 65% With Header Rigid Filter Commercial Rigid Box Filter 27-75l Actual Dimensions: 21 1/2" x20" x 20" x 12" 65% With Header Rigid Filter 1 Pack 20" x 20" x 12" 65% With 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.