Seller notes

DY23/DY23B Accurate Test Automotive Brake Fluid Tester Car Water Content Check Universal Oil Quality DOT 3/4/5 Why We Must Have -- Brake pressure was transmitted by brake fluid, the pressure transmission will out of function once brake fluid including too much water. In order to safe-driving, we must test water ratio scale in brake fluid regularly. The brake fluid tester help us do current maintenance, make sure we drive in safety condition. Operation Manual: 1. Install one 9V(6F22) battery at t...

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