The O2 Addition Valve Swivel Assembly – PRISM 2 FMCL is a replacement oxygen addition valve assembly designed for the Hollis PRISM 2 Front-Mounted Counterlung (FMCL) configuration.
 
Featuring a swivel design for flexible positioning and hose routing, the assembly provides the connection required for controlled oxygen addition to the breathing loop. Built for reliable operation in demanding diving environments, it is suitable for servicing, repairs, or replacement of an existing oxygen addition valve assembly.