PowerQUAD HEPA Filter w/ Pre-Filter Bag

Capable of capturing particles invisible to the naked eye, HEPA (High Efficiency Particulate Air) Cartridge Filter meets industry standards for HEPA air filtration by providing filtration of 0.3 microns @ minimum of 99.97% efficiency. Ideal for working with allergens, powders, and superfine particles. Cloth Pre-Filter Bag provides extra stage of filtration extending cartridge filter life. Fits all Guardair PowerQUAD 55, 30, and 20 Gallon Drum Vacuums and Vacuum Generating Heads.