The Refrigeration Technologies Big Blu Micro Leak Detector is a high-quality leak detection tool designed for identifying tiny leaks in refrigeration systems. With a unit type of gallons, this model (RT100G) is specifically manufactured in the United States. This product from the trusted brand Refrigeration Technologies is perfect for home improvement projects involving heating, cooling, and air systems, providing a reliable solution for detecting and repairing leaks in refrigerator systems.