8''x40'' Funk Filter Replacement Pre-Filters Funk Filter Replacement pre-filters drastically improve the longevity of your filters life. Pre-filters work by trapping dust, airborne particles, and other contaminates. Pre-filters are individually sealed in plastic bags for cleanliness. $19.40
10''x24'' Funk Filter Replacement Pre-Filters Funk Filter Replacement pre-filters drastically improve the longevity of your filters life. Pre-filters work by trapping dust, airborne particles, and other contaminates. Pre-filters are individually sealed in plastic bags for cleanliness. $17.69