For use on automotive, recreational vehicles and boats.Tests freeze protection of propylene glycol-based antifreeze to -50 degrees F. Balls will float to show freeze protection. Temperature compensating for accurate readings at any temperature, hot or cold. Easy and fast to use and read. Pocket protector shows temperature protection scale. Break-resistant tube.
ESTABLISHED IN 1907.
Designers, Manufacturers, and Suppliers of Innovative and Hard-to-Find Automotive Tools, Testers, and
Diagnostic Equipment for the Professional Automotive Technician.