The main function of this brake fluid test pen is brake fluid quality determining
check
Brake Liquid Tester Brake Fluid Liquid Tester Digital Brake Fluid Tester Oil Quality Check Pen Hydraulic Fluid Liquid Oil Analyzer Auto Brake Diagnostic Testing Tool with 5 LED
Brake Fluid Tester: The oil quality tester is designed without cable connector, portable and light weight, convenient to carry and use. This brake liquid tester is used to determine the