Wilkerson filter elements remove solid particulate contamination from the compressed air supply and provide clean air with minimal loss in pressure. The basic function of these Wilkerson filter elements is to clean the air that disperses through the heating and cooling systems. These filters trap and hold particulates and contaminants that could affect user's health and comfort. The process of filtration typically happens when expended air is brought back into the HVAC equipment to be conditioned and circulated again. The air is pushed through the filter, and the material discharges particulates & other contaminants from the air. These ANSI certified, heavy-duty filter elements maintain their shape under high pressure of compressed air and are rated 5 microns for filtration. They are used with Wilkerson's F30 & F35 filters and are available in miniature & pneumatic variants on Raptor Supplies.