Standard Zeagle BC Remote Exhaust Valve assembly (aka Rear Valve). This is the standard dumb valve found on Zeagle BCDs.... (Non-Exhaust Valve 111-9026 is an available Option) Special Notes: 1. There are two styles of thread patterns for the RE Valve. New Style is a course thread, Old Style is a fine thread. Old Style is shown 2. Gasket 111-9370 is not included with this part and may need be ordered separately