*Can correctly measure how much thickness is left in the brake pads
*Red size: 2-3mm, the brake pads must be replaced at this time
*Yellow size: 4-5-6mm, in dangerous driving process, it is recommended to replace
*Green size: 8-10-12mm, indicating that the brake pads are good and in good working condition
Material : Platastic(ABS)
PACKING: SLIDE CARD