Bullard Filter, Threaded, HEPA, Magenta, 6 PK, NIOSH 42 CFR 84Filter, NIOSH Rating HEPA, Magenta, Compatible with Brand and Series Bullard EVA Series, Respirator Cartridge Type PAPR, Respirator Connection Type Threaded, Package Quantity 6 Details For Use With Bullard EVA(R) PAPR Cartridge Approved For HEPA Color Code Magenta Respirator Connection Type Threaded Typical Application General Industry, Healthcare Respirator Cartridge Type PAPR Approved for HEPA Item Filter Standards NIOSH 42 CFR 84 Connection