ITEM NAME:1Pc Brake Fluid Liquid Oil Tester Pen Car 5 LED indicator Electronic Test Tool [Conversion: 1in. = 2.64 cm | 1 cm = 0.39 in.].1 x Brake Tester. Green: 0% Water. Battery OK, no water contained in the brake. Yellow/Yellow/Red: 3% of Water. The brake should be changed. Yellow/Yellow/Red/Red: At least 4% of Water. The brake must be changed urgently.
