3M? 5925 P2R Particulate Filters for use with 3M? Gas and Vapour FiltersUse in combination with 3M 6000 Series Gas and Vapour Filters with a 3M 501 Filter Retainer for combined gas/vapour and particulate protectionExtremely lightweightStandard: EN143 Approval: CE marked1 BOX = 20 FILTERS (NOT PAIRS)