Brake Fluid Liquid Tester Pen With 5 LED Vehicle Diagnostic Tool For DOT3/DOT4

Testing DOT 3, DOT4, DOT5 brake fluid. Tester Instructions Tester Features 1, the green LED lights = water content in the brake fluid H2O <1.5%, brake fluid qualified. A brake fluid tester. 3, the red LED lights = water content in the brake fluid H2O> 3%, can not continue to use the brake fluid needs to be replaced.

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