Airboss ABD-81 CBRN TIC CWA Cannister Filter. in Lower 48 states calculated at checkout. No Sales Tax!! CBRN-CWA-TIC 40 mm Threads (EN 148-1 and NATO compliant) P100 Aerosol Protection (NIOSH 42 CFR part 84) 10 year shelf life Passes Military and NIOSH protocols