The ENFM O12401168212001 05-151FP 1/4F X 1/2F 1/8 Flush Gauge Guard 3882K55 is a high-quality air pressure gauge designed for use in hydraulics, pneumatics, pumps, and plumbing systems. This gauge features a 4-inch dial size and a pressure range of 0 – 3000 PSI, making it suitable for various industrial applications. With a 1/4 IN fitting size and NPT thread type, this gauge from ENFM is a reliable tool for monitoring and controlling air pressure levels in a wide range of systems.