A compact, easy to read gauge, perfect for Pony Bottles, Hang Bottles and even a tank/regulator used for shop air: this is the Compact Pony Bottle SPG.
A standard submersible pressure gauge can be too much in certain situations with its large dial, extra weight and long hose. Just to get a rough idea of how much air is left in a cylinder, a small button gauge is enough on your pony bottle is enough!
