It replaces damaged or worn inhalation valves. It maintains the appropriate level of protection and comfort. Specially designed for use with middle reusable masks 3M 7500 series™. Quick and easy placement. It extends the life of your equipment. 3M™ 7582 inhalation valve is a replacement part fast and easy to replace, and is specially designed for use with middle reusable masks 3M 7500 series™. Be sure to have the correct level of protection and work comfortably with 3M™ 7582 inhalation valve. It is easy to install and helps increase the life of your half mask of the 7500 series. This inhalation valve replaces damaged or worn parts, and is specially designed for use with middle reusable masks 3M 7500 series™.