The ZA2P3 Kasco filter protects against pesticides (but not fumigants, unless allowed on label), dusts and mists. For use with Kasco T8 (#185994) and T9 (#031363-1) pesticide helmets. NIOSH approved when used with the T8 or T9 helmets. Sold individually. KASCO ZA2P3 Organic Vapor And Particulate Filter