Rated to 5000 psi in 1000 psi increments, our 1-inch Button scuba SPG pressure gauge is ideal for use with our Long Scuba Hoses, or pony, Argon and bailout bottles when all you need is an indication of full or empty, and you don't want a long pressure gauge whip hose. A color-coded scale helps ensure an accurate read. Fits standard, 7/16-inch high pressure port of any first stage regulator. No hose required. Chrome plated brass with a polycarbonate face resists corrosion and scratches.