Awesome Complete Pony bottle system. Again, a complete system. Nothing else to buy. No extra gauges, secondary's, etc. Just mount the XS system to your tank and your ready for action. Glad I purchased...A great piece of mind for deep dives. Used the XS sys the first time and had had my first stage blowing air out of the bottom after Annual service. Didn't need to use XS, but it was mighty comforting to know I had it in case.
A great Quality System for a great price.....OnLine beat everyone else on the web...Thank you!