Cartridges for use with 5500 and 7700 Series half masks, and 5400 and 7600 Series full facepieces Key Features Cartridges and filters for use with 5500 and 7700 Series half masks, and 5400 and 7600 Series 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. Recommended Industries/Use Chemical Government Manufacturing Oil and Gas