This Burnham Commercial Temperature/Pressure Gauge measures 2.5 inches in diameter and has a 1/4 inch National Pipe Thread (NPT) fitting. The gauge is designed to monitor both temperature and pressure levels within a system, providing accurate readings that are crucial for maintaining optimal performance and safety. The 2.5-inch diameter of the gauge allows for easy reading of measurements, while the 1/4 inch NPT fitting ensures compatibility with standard pipe sizes. Made by Burnham Commercial, a reputable manufacturer in the industry, this temperature/pressure gauge is built to deliver reliable results consistently.