Robinair's No. 11797 Universal Low Side Refrigeration and A/C Service Compound Gauge displays pressure readings in pounds per square inch (PSI) and Kilopascals (kPa) as well as R-22 and R-134a temperature readings in degrees Celsius. Easy-to-read white on blue/black gauge face. Rugged, impact resistant Lexan lens and brass NPT fitting. Robinair, a Bosch Automotive Service Solutions brand, is a global leader in service tools and equipment based in Owatonna, Minnesota. Robinair is recognized throughout the world as the quality and performance leader in AC/R evacuation tools and this position has led to its success with the full range of products that serve the heating/ventilating/air conditioning/refrigeration (HVAC-R) and mobile markets, which includes the automotive aftermarket along with other industries such as agriculture and construction.