3M™ Ammonia and Methylamine Cartridge, K1, 6054 (Box of 4 Pairs)This cartridge filter, when used for protection against the contaminants as specified, is capable of providing the following protection levels: With a 3M 6000 7500 Series Half Face Respirator: for airborne concentrations up to 10 times the Workplace Exposure Standard (WES) or 1000 ppm, whichever is the lower With a 3M 6000 7800 Series Full Face Respirator: 50 x WES or 1000 ppm, whichever is the lower Ammonia and Methylamine (K1) Approved to AS NZS1716