3M™ 501 Filter Retainer - Replacement Part for Air Purifiers & HVAC Systems - Perfect for Home, Office and Industrial Air Filtration Maintenance

The 3M™ Filter Retainer 501, Respiratory Protection System Component holds 3M™ Particulate Filters 5N11 and 5P71/07194 (AAD) in place on top of 3M™ Respirators 5000 Series, 3M™ Cartridges 6000 Series and 3M™ Filter Adapter 603 (all respirators, filters, cartridges, and adapters sold separately).