This assembly also includes one 3M Center Adapter Gasket 6896 and one 3M Exhalation Valve 7583. This product is designed to be used with the 3M Full Facepiece Respirators 6700, 6800 and 6900.
3M 37000, Center Adapter Assembly 6864/37000(AAD), 7000002178, 5 EA/Case
$496.26
Factory Stock, 7-10 Day Leadtime, Priced Per Case
This product features a proprietary design exhalation valve that increases user comfort by making breathing exhalation easier. The unique valve cover design also enhances the protection of the exhalation valve from debris.

3M 47408, 663FC 1" X 30", 70u Diamond Trizact Belts, 7010509031
3M 50216, Temflex Cotton Friction Tape 1755, 3/4 in x 82-1/2 ft, Black, 7010297809
3M 72600, 663FC 1/2" X 30", 70u Diamond Trizact Belt, 7100206529
3M 71361, 641WY 1/4" X 24", 1200 Mesh Diamond Cloth Belt, 7010534916
3M 37005, Head Harness 6897/37005(AAD), 7000002035, 5 EA/Case
Dynabrade 51029 3/8"-24 Female _ 1/4"-20 Female, 1-3/8" Length
Dynabrade 50149 3/8"-24 Female M14 x 2 Male, 1" Length 
