The 3M P95/OV Paint Project Reusable 6211P1-DC is a medium-sized mask replacement cartridge with a filter class of P95. It is designed for personal protective equipment in various industrial settings, particularly for those working with paints and other chemicals. The cartridge has an expiration date of 01/2031, ensuring its effectiveness for a long period of time. Made by the reputable brand 3M, this mask replacement cartridge offers reliable protection for users in need of respiratory protection.