Model: 6004 (pair)Ammonia and methylamine cartridge.Swept-back design for enhanced field of view and balance. Use with 3M™ Reusable Respirators. NIOSH approved against ammonia and methylamine. Use with 3M™ Half and Full Facepieces 6000, 7000 and FF-400 Series with bayonet filter holders. Use in a variety of applications including agriculture, chemical manufacturing, laboratories and the food industry.