Provides 99.97% filter efficiency for all particulates 7581P100: Approved for use against organic vapors 7582P100: Approved for use against acid gases (chlorine, hydrogen chloride, sulfur dioxide, hydrogen sulfide (escape), chloride dioxide, hydrogen fluoride) 7583P100: Approved for use against organic vapors and acid gases (chlorine, hydrogen chloride, sulfur dioxide, hydrogen sulfide, chloride dioxide, hydrogen fluoride) 75SCP100L Defender™: Approved for use against organic vapors, ammonia, methylamine, formaldehyde and acid gases (chlorine, hydrogen chloride, sulfur dioxide, hydrogen sulfide, chloride dioxide, hydrogen fluoride) SPECIFICATIONS Type Cartridge/Filter Combination Protection Type Organic Vapor, Chlorine, Chlorine Dioxide, Hydrogen Chloride, Hydrogen Fluoride, Sulfur Dioxide NIOSH Classification P100 Color Code Yellow Package Size 2 Units Weight 8.00 lbs