The DotPro 330 is MIRA Safety's industrial-grade 40mm combined gas mask filter — certified to EN 14387:2004+A1:2008 and rated A2B2E2K2HgP3, providing broader gas and vapor coverage than the entry-level NBC-17 SOF at the same price point. It adds mercury vapor protection (rated for over 170 hours) and stronger inorganic gas coverage (B2 vs B1) while maintaining the same greater than 99.99% particle filtration efficiency and 10-year shelf life. Industrial-Grade Coverage Rated A2B2E2K2HgP3 under EN 14387+A1, the DotPro 330 covers organic vapors (over 35 minutes at 5000 ppm), inorganic gases including chlorine and hydrogen sulfide (over 25 minutes), acid gases, ammonia (over 40 minutes), and mercury vapors (over 170 hours). Decontamination agent resistant — maintains filtration integrity during cleaning procedures. Dual-layer construction with activated carbon and polypropylene media. Proven Performance Actual tested particle filtration: greater than 99.99% at 95 L/min for both NaCl and paraffin oil aerosols. Breathing resistance of 260 Pa at 30 L/min and 900 to 980 Pa at 95 L/min. Operates reliably from -30°C to +70°C at up to 95% humidity — the widest temperature range in the MIRA filter lineup. Universal Compatibility Standard 40mm NATO threading (Rd 40x1/7" per EN 148-1 / STANAG 4155), compatible with any 40mm full-face respirator. Filter dimensions: 110mm diameter, 85mm height, 360g. CE marked under EU PPE Regulation 2016/425. Long-Term Preparedness 10-year factory-sealed shelf life. Store between -5°C and +30°C at under 80% humidity. Shock and impact resistant housing. Available as a single filter or pack of 4 — ideal for equipping a household, workplace team, or organizational kit. Expiration date marked on canister. Features Certified to EN 14387:2004+A1:2008 · Filter code: A2B2E2K2HgP3 · Particle filtration: greater than 99.99% · Mercury protection: over 170 hours · Dimensions: 110mm x 85mm, 360g · Operating range: -30°C to +70°C, 95% humidity · NATO 40mm x 1/7" threading · 10-year shelf life · Available single or 4-pack · Includes one (1) DotPro 330 filter. Mask and other equipment shown are not included.