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D&R 500 – Block Heater Tester
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D&R 500 – Block Heater Tester
This is the D&R 500 – Block Heater Tester. Keep our handy device in your glove box and use it to quickly verify if your block heater is actually working. After using our tester you can then plug your extension cord directly into your block heater with confidence, knowing that the block heater circuit is live and working properly.
$25.00