3M 6054 K1 (Ammonia Gas Filter)CharacteristicsK1 filter gas and vapor filter provides protection against ammonia vapors. Compatible with 3M™ 6000 and 3M™ 7000 Series Half and Full Face Masks. Easy fitting with Bayonet connection system. The filters can be used with all 3M™ Half and Full Face Masks equipped with a sponge connection system. HazardsGas, Vapor, and Particulate Filters