Pollutant dust is safely captured with a powerful cyclone collector than safely stored in a supplied 55 gal drum. An optional filter inspection station, recommended for air intake filters used in high-horsepower diesel engines, measures restriction levels of air filters to confirm filter integrity. The machine accommodates filter sizes with 6- to 14-inch inside diameters and a maximum outside diameter of 18 inches and a maximum length of 32 inches. www.diversitech.ca