O-ring 6F used on the Injector Cap and Injector Screen Cap.
Was used on older Autotrol 155, 160, 163, 168, and Technetic 1000 Valves.
Note: If you order a replacement Cap ( 8F or 7F ) this o-ring is included.
We have a limited quantity of this o-ring and Autotrol is no longer selling them as a separate item ( with new caps only ).
But we will continue to offer them until our stock is depleted.