The 3M™ Inhalation Valve Replacement 7582 is a replacement inhalation valve designed for 3M™ Half Facepiece Reusable Respirator 7500 Series.The 3M Inhalation Valve Replacement 7582 is to be used with 3M Half Facepiece Reusable Respirator 7500 Series only. Replacement part can extend respiratory equipment service life.