Thexton Professional Disc-Type Testers

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.