Cold-Chek® Professional Anti-Freeze Tester. Large professional-size (16 1/4”) tester is accurate at all temperatures. Tests coolant, hot or cold. Celsius and Fahrenheit scales. Special feature is the “6th disc” which shows over protection and a loss of cooling efficiency. Beyond 70% antifreeze, cooling & corrosion effectiveness is reduced. Tests Dex-Cool, Prestone, Zerex, and long-life coolants.

Warning: This product may expose you to chemicals including lead which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov