Jet Air Pulse Reverse Dust Collector 4 heavy duty replaceable cartridges 1,240 sq. Ft. Filter area 4,000 CFM fan capacity Dimensions: 60"L x 38"W x 154.5"H Shipping Weight: 3200 lbs. All Winona Van Norman blasters include a dust collector system as standard equipment. The dust collector MUST be used when the machine is operating. The dust collector filters air pulled from the blast cabinet through a series of cartridges to remove particulate of contamination and spent shot. The filter media used is very efficient, approaching 97% on 0.8 micron and 100% on 2 micron particulate.