3M 501 Pre Filter Retainer - (1 Pair)
These 3M filter retainers are ideal for keeping the filters in place at the front of the respirators. Suitable for filters 5911, 5925 and 5935. Suitable for use on the 3M particulate filters 5000 series and 3M cartridges 6000 series. Also compatible with 3M filters 5000 series to add further protection to the gas and vapour filters.