Features 3M PAPR (powered air-purifying respirator) particulate filters and vapor cartridges install on PAPR (powered air-purifying respirator) systems to filter contaminants from ambient air. They are rated based on the type of contaminant and the percentage of contaminants removed before filtered air reaches the worker. Filters remove dry particulates such as dust. Cartridges remove vapors and gases such as paint thinner and welding vapors. For Use With / 6000 Series Series Full Face Respirators, 7500 Series Half Mask, FF-400 Series Full Face Respirators Compatible with Brand / 3M Compatible with Grainger Part Number / 3PB42, 4AVH8 Compatible with Manufacturer Part Number / 7093C, 7093 Compatible with Series / 6000, 7500, FF-400 Brand and Series / 3M Color / White Material / Plastic Features / Full Facepiece Reusable