The disposable pre-filter bag extends the lifespan of the HEPA cartridge filter.
Fits Vacmaster Industrial models VK811PH and VK1011SIWTH
This replacement HEPA cartridge filter has been individually tested and certified to have a minimum efficiency of 99.97% at 0.3 microns in accordance with IEST-RP-CC001 test requirements and meets the EPA's Lead Renovation, Repair and Painting (RRP) requirements.