Proteam 100030 backpack vacuum HEPA dome filter replacement is a commercial-strength, rugged alternative for these Proteam backpack vacuums. SuperCoach, SuperQuarter, MegaVac, AviationVac, GoCartVac, and LineVacer. Unlike whimpy cheapy vacuum dome filters . . . this traps dangerous, invisible spores, dust, pollen and other airborne particulates that threaten the young, elderly and sick . . . avoid breathing in dangerous particulates blown up into the air while your working . . . don't foolish and risk your health. Top Choice: Hospitals, Nursing Homes, Day Care, Class A Offices, Resorts & Hotels, Airports, Stadiums, Theaters, Restaurants, Churches, Universities, Fitness Centers, Schools, Manufacturing, Museums, Retail Stores, Amusement Parks, Military, etc. 6 replacement backpack HEPA dome filters per kit. Buy 4 -- Get 2 Free bulk pack. When safety and health of others (including your own) matters more . . .