【Applicable Information】This Aautomotive coolant tester is ideally designed for testing hot or cold batteries on 6 and 12 volt systems. Also called coolant, designed to prevent water from freezing in cold climates. Rinse with water after each use for accurate readings. 【Applicable Information】This Aautomotive coolant tester is ideally designed for testing hot or cold batteries on 6 and 12 volt systems. Also called coolant, designed to prevent water from freezing in cold climates. Rinse with water after each use for accurate readings. 【Applicable Information】This Aautomotive coolant tester is ideally designed for testing hot or cold batteries on 6 and 12 volt systems. Also called coolant, designed to prevent water from freezing in cold climates. Rinse with water after each use for accurate readings. 【Durable Material】100% brand new and premium quality coolant tester strip uses durable materials that withstand the elements. Easily inspect for color and presence of rust, mud or other sediment. 【With easy-to-read indicators】 The dial-type antifreeze coolant tester is accurately calibrated with easy indicators worth reading. 【High Accuracy】 Calibrated in ℃ and ℉, measures freezing point for winter protection and boiling point for summer protection. Fast and accurate with an easy-to-read scale and pointer.