Improve the performance of your K-9 high velocity dryer!  This filter replaces the standard snap-on filter of K-9 line of dryers and blowers. Increased air flow with better filtration. Lasts much longer than standard filters. High production shops should replace their filter every 6 months (replace only the filter and not the entire unit), to keep your dryer in good working order. Keep the outside of filter clean by vacuuming or blowing off the outside surface.