Disposable Fiberglass Panel Filters F312, Box of 12 filters Frames constructed from recycled material 16x25x1 MERV 4 pinch frame panel filters Ideal for dusty, high velocity commercial/industrial applications The superior grade fiberglass media is evenly coated with a gel adhesive to prevent finer particle migration The average arrestance is 72%Disposable Fiberglass Panel Filters F312, Box of 12 filters Frames constructed from recycled material 16x25x1 MERV 4 pinch frame panel filters Ideal for dusty, high velocity commercial/industrial applications The superior grade fiberglass media is evenly coated with a gel adhesive to prevent finer p