20" x 20" x 12" 85% With Header Rigid Filter Commercial Rigid Box Filter Galvanized Rigid Box Filter:20" x 20" x 12 85% With Header Rigid Filter 19 7/8" x 21 1/2"

19 7/8" x 21 1/2" x 2" MERV 11 - Pleated Air Filter - 6 Pack

20" x 30" x 1" MERV 8 - Premium Pleated Air Filter - 6 Pack

12" x 24" x 12" 65% No Header Rigid Filter - 1 Pack

12" x 18" x 4" MERV 11 - Pleated Air Filter - 6 Pack

15" x 39" x 1" MERV 8 - Premium Pleated Air Filter - 6 Pack

20" x 20" x 12" 85% With Header Rigid Filter Commercial Rigid Box Filter Galvanized Rigid Box Filter:20" x 20" x 12 85% With Header Rigid Filter 19 7/8" x 21 1/2"20" x 20" x 12" 85% With Header Rigid Filter 1 Pack 20" x 20" x 12" 85% 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.