The SC Series cartridge collector features a patented nozzle-cleaning system and internal high side inlet baffles. The unit’s heavy-duty design features all-welded construction. Cartridges are easily accessed from the outside and no tools are required. All SC units are on-line cleaning with solid-state timer board all pre-wired and tested.Scientific Dust Collectors, Alsip, IL 708-597-7090 www.scientificdustcollectors.com