3M 2138 P3R (nuisance level organic vapour and acid gas) particulate filters.Stand alone, lightweight particulate filters* Lightweight* Low breathing resistance* Bayonet fitting system ensures precise and safe locking* Versatility: can be used on all 3M 6000, 7000 and 7500 Series Half Masks and Full Face Masks 1 BOX = 20 FILTERS (NOT PAIRS)
