USD double house with Phoenix first stage, Adjustable ScubaPro octo w/swivel,long hose, older ScubaPro SPG, and Argonaut DSV. Hasn't been used in years. Basically untested and therefore sold as parts. I did connect to the 2k psi I did have, and noticed no immediate leaks or freeflow. Ask any questions, but probably have forgotten more than I ever knew on these things.