Description 3M 501 Filter Retainer (Pack of 2) 3M 501 Filter Retainer (Pack of 2) For use with all 6000 & 7000 series respirators. Holds 06915 and 06911 filters in place. The retainer is for use with all 6000 and 7000 series 3M respirators. The 3M Filter Retainer helps to keep your 3M filters in place, ensuring that your respirator can continue to provide you with the protection you need. The retainer is easy to use, simply snap it into place on your 3M respirator. Keep your 3M filters in place with the 3M Filter Retainer.
