Cloth Pre-Filter Bag – Model No. N635B

Cloth Pre-Filter Bag – 20/30/55 Gallon Vacuums – Model No. N635B

Extend the life of Guardair cartridge filters with Cloth Pre-Filter Bag. Cotton flannel bag installs over Standard, HEPA, and ULPA cartridge filters providing extra stage of filtration. Prevents wear and tear by capturing larger particles before they reach the cartridge filter. It is washable and reusable. It is available as a replacement part for HEPA and ULPA filters. It can be used as a upgrade part for Standard filter.