- Easy to read indicator and designed for modern Propylene Glycol antifreeze.
- Number of floating discs measures the level of coolant protection
- Tests at hot and cold temperatures.
- Reads in Celsius and Fahrenheit.
- Bulb is Green, 5 discs. For the more popular Ethylene Glycol antifreeze use Part No 4293
A 50/50 mixture of antifreeze and water will give full coolant protection and is suitable for most climates.