3M 501 Combined filter ring - Plastic - Transparent - Per box of 2 pieces . Box of 10 boxes of 2 p
Item No. 11115938
The 3M 501 accessory is a combination filter retainer. It serves as a holder for 3M gas filters to a dd dust protection 5911, 5925, and 5935. It can also be combined with the 603 particulate filter, so that it can be mounted directly on 3M half and full face masks.