• Disc-Type anit-freeze tester • Large professional sized tester (16-1/4" long) is accurate at all temperatures. Tests coolant hot or cold. Easy to read discs are magnified by convex designe of the clear SAN plastic barrel. Celsius and Fahrenheit scales. • Special feature is the "6th Disc" which shows over protection and a loss of cooling efficiency. Beyond 70% anti-freeze, cooling & corrosion effectiveness is reduced. One-piece bulb and neoprene dip tube.
