Thexton 106, Cold-Chek Professional Anti-Freeze Tester

Professional disc-type16 1/4" tester is accurate at all temperatures. Tests ethylene glycol based coolant, hot or cold, including Dex-Cool®. Easy to read discs are magnified by convex design of the clear SAN plastic barrel. Celsius and Fahrenheit scales. Special feature is the "6th disc" which shows overprotection and a loss of cooling efficiency. Beyond 70% anti-freeze, cooling & corrosion effectiveness is reduced. One-piece bulb and neoprene dip tube.