This submersible pressure gauge is made from brass and the lens is made from a high impact polycarbonate plastic.  These gauges have a highly luminescent face with very easy to read numbers, even in the darkest of conditions.  One of the unique features is an "FULL/EMPTY" indicator located in the center of each gauge which also indicates your gas level (i.e. over 1450 psi shows a full "GREEN" in the display window - 1450 to 725 psi shows half "GREEN/ORANGE" in the display window - below 725 psi show full "ORANGE" in the display window).   Each gauge is prepared with viton O'rings and oxygen compatible lubricants.  The gauges come standard with a 32" high pressure hose.  There is an attachment loop located at the top which is ideal to connect to a retractor.

These spg's are great for night divers and instructors’ wanting to now how much air is left in a cylinder.

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