Guardair / Nortech 55 & 30 Gallon Absolute HEPA Cartridge Filter
Capable of capturing particles invisible to the naked eye, HEPA (High Efficiency Particulate Air) Cartridge Filter meets industry standards for HEPA air filtration - 99.98% efficiency for particles up to 0.3 microns. Ideal for working with allergens, powders, and superfine particles. Cloth pre-filter bag provides extra stage of filtration extending the life of the cartridge filter. For use with all 55, 30 and 20 Gallon Guardair Drum Vacuums and Vacuum Generating Heads.

• Features
• Pleated paper filter
• Galvanized carbon steel cage
• Minimum filtration: 0.3 microns @ 99.98% efficiency
• Minimum flow rating: 370 cfm @ 3" H2O
• Medial velocity: 10 cfm
• Cloth pre-filter bag