This Noshok 4-inch gauge from the 100 series is perfect for measuring air pressure in your industrial or plumbing applications. With a face diameter of 101.6mm, this gauge is easy to read and comes with a back mount for easy installation. The gauge measures pressures up to 160 psi and has a connection diameter of 0.8mm. The brand, NOSHOK, is well-known for producing high-quality industrial products, and this gauge is no exception. Use it to measure air pressure in your hydraulic, pneumatic, or plumbing systems.