The 3M™ Cartridge/Filter Holder 7586 is designed to be used with the 3M™ half facepiece reusable respirators 7501, 3M™ half facepiece reusable respirator, 7502 and 3M™ half facepiece reusable respirators 7503. It includes two inhalation valves and one exhalation valve. The 3M™ Cartridge/Filter Holder 7586 is to be used with compatible products. Replacement part can extend respiratory equipment service life. 3M™, 7000002160, Cartridge/Filter Holder, Series: 7500 Series, For Use With: 7501/7502/7503 Series Half Facepiece Reusable Respirators, Specifications: Bayonet Connection, Black