I bought this to do my own shallow-water diving (including my own fill from an electric compressor). It includes the tank, regulator, secondary breathing regulator/mouthpiece, tank fill pressure gage you can read while diving, and vest. The vest adjusts well for fit, and holds the tank and lines nicely. The entire assembly weighs about 9-1/2 lbs and is just slightly bouyant. I got about 15 minutes of dive time near the surface running from 3000psi full down to 500psi, which is what I was expecting. This is the minimum size and set-up I would recommend. It is easy to handle. So far it is working well. Read more