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Suitable for testing Propylene Glycol coolant (anti-freeze) density. The five floating discs enable accurate readings in both Celsius and Fahrenheit as well as testing hot and cold and measuring the condition of the anti-freeze. Features and Benefits • Suitable for testing Propylene Glycol coolant density • Measuring range from -7 to -46 °C / +20 to -50°F • Manufactured from strong and durable plastic and rubber • Overall length is 465mm • Easy to read gauge Contents 1 x Disc Type Anti-Freeze Tester