Durable brass construction: The nitrogen pressure tester is made from robust brass to withstand frequent shop use and resist corrosion. This ensures long service life and reliable performance during repeated pressure checks. Accurate, easy-to-read gauge: The gauge provides clear readings to help you diagnose leaks and verify system tightness quickly. The dial diameter is approximately 3.54 inches for good visibility while you work. User‑friendly ball‑valve design: Equipped with ball‑structure valves that can replace a conventional head, the tester makes connections and flow control simple and convenient. The valve design reduces fumbling and speeds up testing procedures. Practical size for shop and field use: Total length is approximately 12.99 inches, offering a balanced size that is easy to position in tight spaces while remaining sturdy and controllable. Versatile compatibility: Designed for pressure testing a variety of systems including air conditioners, automobiles, and central HVAC systems. Use it wherever a nitrogen pressure check or leak test is needed. Why you need it Saves time: Fast, intuitive valve operation and a clear gauge help you complete checks more quickly than with improvised tools. Reduces rework: Reliable construction and accurate readings lower the chance of missed leaks and repeated repairs. Fits multiple applications: One tool covers automotive, residential, and commercial HVAC testing needs, reducing the number of specialty gauges you must keep on hand. Typical use scenarios 1) HVAC technician performing a nitrogen pressure test on a split air conditioning system to verify line integrity before charging refrigerant. 2) Auto repair shop checking an automotive A/C circuit for leaks after component replacement. 3) Building maintenance staff conducting routine pressure tests on central air systems to locate leaks and confirm system tightness. Key specifications Material: Brass Total length: approx. 12.99 inches Dial diameter: approx. 3.54 inches Valve type: Ball‑structure valves (replace conventional head) Applications: Air conditioners, automobiles, central HVAC systems This nitrogen pressure tester combines durable materials, a clear dial, and a practical ball‑valve design to make pressure checks faster, more reliable, and easier to perform across multiple applications.