3M 501 Filter Retainer

3M 501 Specifications:
•  Retainer

3M 501 Includes:
•  (1) Filter Retainer

3M 2091 Features:
•  Used to hold 3M Particulate Filters 5N11 and 5P71 in place on top of 3M Respirators 5000 Series and 3M Cartridge 6000 Series (all sold separately)