The 3M™ 501 Filter Retainer securely holds 3M™ 5N11 and 5P71 filters in place on 3M™ 5000 Series Respirators, 6000 Series Cartridges, or the 603 Filter Adapter.
This product is reusable but should be replaced when worn or damaged.
Designed to attach the appropriate filters when there is a need for particulate protection.