These 3M N95 Particulate Filters protect against dusts, mists and fumes that don't contain oil. Requires filter cap 218681. If being used as a filter without separate cartridge, requires 3M Filter adapter, 3M model 7100066104. NIOSH Approval No. TC-84A. Filters come in pkg. of 10. 3M N95 Particulate Pre Filters | 10 pack