... Cartridge And Cartridge Filter1,Suitable for the filtration of fine dust type in plastics, spray powder, sand blasting, pigment ... material with tight pore structure.3,Excellent moisture resistance and dust release properties.4,Durable and rigid material, washable Greater ... 5,Electrochemical plate top and bottom, no rust Perforated zinc galvanized metal inner core allows good airflow.6,Specialty ...