DC-3 Dust Collector Mouse Over Image To See Larger Images 6 double lined fire resistant bags 156 sq. Ft. Filter material 725 CFM flow rate Dimensions: 44"L x 28"W x 115"H Shipping weight: 1255 lbs. Auto Shaker and Silencer are Optional 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 bags 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.