The (SC) Horizontal Cartridge Collector is Scientific Dust Collectors® newest line of Cartridge Collectors. The SC is an economical yet heavy duty pulse-jet cartridge collector. It features a fully welded construction (not bolted together), a downward airflow, and utilizes the patented supersonic nozzle cleaning system. Cartridges are secured with a removable-hinged access door for quick and easy cartridge change outs. NO TOOLS REQUIRED!