The retainer 501 is used to hold 5925 Filters in place on 6000 Series Gas and Vapour Cartridges and 7000 Series Gas and Vapour cartridges.
 
The 3M™ Cartridge Filters 6000 Series attach 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