The Uniweld High Side Gauge for L38-174 0-500psi refrigerant gauge is a reliable and accurate pressure gauge designed specifically for HVAC and refrigeration systems. Manufactured in the United States in 2007, this gauge comes in a vibrant red color and is brand new, sealed in its packaging. With a vacuum unit of PSI, this gauge is perfect for measuring pressure in refrigerant systems with precision. Perfect for professionals in the HVAC industry, this Uniweld gauge ensures quality and efficiency in every measurement.