Our full range of N-Series filters and cartridges are designed to help protect workers in a variety of hazardous environments. For use with our Honeywell North Half Masks and Full Facepieces. – Combination filter cartridges feature a low profile with curved top that will not catch on pipes or other objects. – Easy to perform user seal checks: even on the gas and vapor cartridges. – Full offering, from organic vapors to multi-contaminant