18 x 24 x 1 Polyester Air Filter Pad MERV 7 , 6 Pack
Velocity 500 fpm.. Air Filter Pad, Performance Rating MERV 7, Filter Efficiency - Air Filters 60 Percent, Dust Holding Capacity 255 g, Media Material Polyester, Media Color White, Filters Out Cat & Dog Dander, Cement Dust, Dust Mites, Dusting Aids, Fabric Protector, Hair Spray, MERV 5-8 Mold, Pudding Mix, Spores, Removes Particles Down To 1.0 to 3.