DOT3,DOT4,DOT5.1 DOT3,DOT4,DOT5.1 DOT3,DOT4,DOT5.1. 4: High quality to testing DOT 3, DOT4, DOT5 brake fluid. Brake Fluid Liquid Tester Pen 5 LED Auto Car Diagnostic Tool for DOT3/DOT4. 1: The brake fluid tester is suitable for checking the car brake oil quality.
