Micro Air's Model RP1 - Twister, Single Cartridge Dust Collector with Unique Cyclonic Drop-Out Feature, equipped with 99.999% efficient fire-retardant cartridge filter, and with Micro Air's exclusive Roto-Pulse TM Cartridge Cleaning System provides quiet cleaning power in a small package. With noise levels measured at 72 dBA at 5' and overall dimensions of 18.5" round x 72.5" high this dynamo is comparable in price to less efficient cyclones and shaker systems but provides the higher capture efficiencies of the RP series of Micro Air Dust Collectors. That, coupled with Micro Air's revolutionary Roto-Pulse TM Cartridge Cleaning System, extending cartridge life well beyond typical reverse pulse cleaning systems, comprises the total "Twister" Package.