Tests modern propylene glycol coolant antifreeze, hot or cold. Protection level is indicated by the number of the five large coloured discs which float in the sample. Easy-to-read temperature table on the virtually unbreakable plastic body. Tests modern propylene glycol coolant antifreeze, hot or cold. Protection level is indicated by the number of the five large coloured discs which float in the sample. Easy-to-read temperature table on the virtually unbreakable plastic body.
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