Pricing mentioned is for a CS. Requires a minimum buy of 1 CS. 6000 Series Half and Full Facepiece Accessories, Exhalation Valve, 10 per bag; Hazmat=False; Features=Accessories provide increased versatility and comfort;Offers convenience coupled with cost savings;Replacement parts extend the life of the 3M respirator; StandardPack=10EA/CS; CountryOfOrigin=US; Height=1 in; Length=9.300 in; Type=Exhalation Valve; Used With=Center Adapter Assembly 6892; Width=15 in;