This cartridge is NIOSH approved to help provide respiratory protection against ammonia, methylamine and particulates. Use with 3M™ Half and Full Facepieces 6000, 7000 and FF-400 Series. This ammonia/methylamine cartridge/P100 filter can be used for a variety of applications, including agriculture, chemical manufacturing, laboratories and the food industry. Swept-back design offers enhanced comfort and visibility. 2 pack.