P100 Combination Respirator Cartridge Refill 6 Pack MSA"Shortstack" for Vapors and Particulate OV/CL/HC/SD/CD/HS(ESC) fits other brands - expedited shipping Meets OSHA requirements: Protects against organic vapors and particulates: Protects against: hydrogen sulfide, chlorine dioxide Protects against: hydrogen sulfide (escape only), chlorine dioxide Protects against: chlorine, hydrogen chloride, sulfur dioxide Fits other brands of P100 respirator masks; threaded, easy screw on