Has your P100 particulate cartridge worn-out? The 8990 P100 particulate cartridge by Moldex is a perfect replacement for your regular cartridge used in 8000 series Moldex half mask respirator. This cartridge is for use with contaminants like asbestos, lead, inorganic arsenic and cadmium; substances which fall under the OSHA HEPA. It can also be used for both oil based and non-oil based particulate pollution. Cartridges snap into place for easy replacement and come with a new exhalation valve. Additionally, this particulate cartridge can be used as a standalone filter or piggyback the 8000 gas/vapor cartridges.