1.high efficiency 2.high precision 3.wide application Specifications1.filter material:Glass Fiber, Polyester,etc 2.dust removal: 99.99% 3.structure: ... material, it can increase filter area by times.2.with high precision efficiency for 99.99% ,it can remove super-fine ... filter with large filter area, small hole diameter, high efficiency, etc.2.The material for conver and frame is galvanised plate, ...