The JB Industries DV-41 Digital Vacuum Gauge is a reliable tool for testing vacuum levels in HVAC and refrigeration systems. This black vacuum gauge, specifically designed for R-22 refrigerant, features a digital display for accurate readings. The model DV-41 comes with a case and one valve, making it convenient for on-the-go use. With a gauge fill of liquid and vacuum units in microns, this 2016-manufactured device is a valuable asset for professionals in the HVAC industry.