The Diff-DD Panel provides the ultimate intake protection. The pre-filter is a synthetic pad trapping larger particulate and protecting the final filter. The secondary filter features a progressively structured media with an adhesive dust binder to trap and hold dirt even in a vibration environment. The air exiting side of the Diff-DD Panel consists of a reinforced scrim backing to guarantee zero fiber migration of particulate down to 5 micron and create a laminar flow in the spray booth. The media is heat sealed around a wire grid for support.