This Weston Model 1531 gauge is a reliable and sturdy tool for measuring DC current up to 120 microamps. It features a black color and comes in a sealed and ruggedized casing for optimal durability. The gauge is made by the reputable brand Weston and is suitable for use in various settings, including business and industrial environments. The unit is of unknown origin but has not been modified in any way. It is a single unit and comes with a range of 0-120 microamps. Whether you are a professional or a hobbyist, this Weston Model 1531 gauge is a valuable addition to your collection of test meters and detectors. Exact item is shown. Some wear on the face, as shown. Gauge moves when 9v battery is applied to the terminals. OD is 3.5" across the face, mounts in 2.5" opening, 1.625" depth. Mounting holes are 2.75" center to center. Please review our business policies in our store for information regarding returns, shipping and warranties.