... .High efficiency, long life span3.Easy to change the filter bag4.Low energy consumption5.Material of Bag: Needled-punched ... felt6.Small occupationSpecification of cartridge dust collector, cartridge air filter:1. Applied advanced downflow design and cartridge horizotal insertable ... durable layer, approaches-avoidance of high speed impact to filter cartridge,thereby extend the life of them.3. Cartridegs ...