3M Retainer, 501, 20/pack 3M Reusable Respirator Filter Retainers enable users to add particulate protection to existing 3M Gas & Vapour filters for use in a wider range of applicationsFor use with 3M Particulate Filters 5000 Series, 3M Reusable Respirator Filter Retainers enable users to easily combine their protection for use with a wide range of gas, vapour and particulate hazards, or a combination of these. Product Information Brand 3M Part # 7100211073 Origin Country USA Product Type Accessories Extra Product InformationGet tailored protection for your application with 3M Reusable Respirator Filter Retainers Our filter adapter enables users to combine 3M Particulate Filters 5000 Series and 3M Gas and Vapour Filters, and is designed for use with 3M Resuable Respirator FiltersFilter adapters can be easily inserted and removed, allowing workers to adjust their filter combinations depending on the hazards encountered in the workplace.Product InformationConnects the 3M Particulate Filters 5000 Series to the 3M Gas & Vapour FiltersEasily combine 3M Gas & Vapour filters with 3M Particulate Filters 5000 SeriesQuick and easy to fitSpecially designed for 3M Reusable Respirators