Description 3M Replacement Filler Retainer 501. 2 Pieces. Automotive Paint. The retainer 501 is used to hold 5925 filters in place on 6000 and 7000 Series Gas and Vapour cartridges. The 3M Cartridge Filters 6000 series attach to to 3M Half and Full Face Respirators to provide gas and vapour protection. Lightweight and well balanced when fitted to a mask Unique shape provides excellent field of vision 3M Bayonet Fixing System ensures precise and secure locking.
