The Hypro 3850K31 pressure gauge is a high-quality instrument designed for measuring air pressure in the range of 0-15 psi (0-1 bar) with a 1/8 inch connection diameter. With a face diameter of 1.5 inches, this pressure gauge is ideal for industrial applications in hydraulics, pneumatics, pumps, and plumbing. The unit quantity is set at one, making it a convenient and reliable tool for monitoring and controlling pressure levels in various systems.