K Tool 70211 Antifreeze Tester, for Ethylene Glycol, Test with Engine Hot or Cold, Temperature Adjustment Scale

Hydrometer immediately and accurately tests strength of all permanent solutions (ethylene glycol), with engine hot or cold, and includes temperature adjustment scale for accurate interpretation of mixture strength. Assists in preventing winter freezeup and summer boilover. Two embedded scales show freeze point of radiator solution and boiling point of summer coolant.