Using first Pocket filter and Second Hepa filter, it is perfectly collect the gold dust, and the filter can be easily dismounted for replacement
|  It removes 99.98% or more of particles of 0. 3um(3/1000mm) or larger.  It convenient for replacement of filter which has Pocket type.  Because of designed by Low noise, Quiet operation is possible  It has attached motor-speed-controller for adjustment of airflow | 
 
 
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