Lock down your air with the Parcil Safety DefensePro N-B-1 40mm Filter Canister, an A2B2E2K1P3 R-rated respiratory filter built for tactical operators, industrial pros, and serious preppers running 40mm NATO-threaded masks. Whether you are stocking the prep cabinet, rotating filter inventory at a chemical site, or running an active mission, the N-B-1 delivers multi-class protection in a single, ready-to-thread canister. The A2B2E2K1P3 classification covers a broad threat surface: organic gases and vapors, inorganic gases and vapors, acidic gases and vapors, ammonia and derivatives, plus solid and liquid aerosols (dust, fumes, and mists). An activated carbon layer pairs with a high-efficiency particulate stage rated to capture at least 99.9 percent of particulate threats. The canister meets European standard EN 14387:2004+A1:2008 and is classified as a Class 1 filter. A 40mm NATO threaded connection makes the N-B-1 compatible with standard NATO-spec masks across military, law enforcement, and prep platforms. The compact, lightweight housing reduces wear fatigue during extended use, and the long service life cuts replacement frequency for users who carry stock across multiple shifts or seasons. Practical, rugged, and "tried and true," the N-B-1 is a no-compromise filter for construction, chemical handling, painting, manufacturing, mining, petrochemical, utilities, mold remediation, and emergency services. Specifications Classification: A2B2E2K1P3 R, Class 1 Particulate Filtration Efficiency: 99.9% Minimum Filter Standard: EN 14387:2004+A1:2008 Threats Filtered: Organic / Inorganic / Acidic Gases and Vapors, Ammonia, Solid and Liquid Aerosols Filtration Layers: Particulate Layer, Activated Carbon Layer Attachment: 40mm NATO Thread Use Cases: Construction, Chemical Handling, Painting, Manufacturing, Mining, Petrochemical, Utilities, Mold, Emergency Services