The 4" X 30" SS Case Back Connect Vacuum Gauge 202D404A is engineered for precise vacuum measurement in industrial settings. This gauge features a stainless steel case that provides durability and resistance to corrosion. With a 4-inch diameter and a 30-inch vacuum range, it is suitable for a variety of applications, including HVAC and process control. The back connection design allows for easy installation in tight spaces. This gauge meets industry standards for accuracy and reliability, making it an essential tool for monitoring vacuum levels.