This is Brake Pad Wear Indicator OE number is 20928533.It fits VOLVO Truck .This product is engineered to meet all the high standards set by the industry. It is known for its quality, performance and dependability and provides long, maintenance free life. This unit is put through a variety of tests under extreme and unusual conditions to ensure high quality and dependability.If you have any question,please feel free to contact sales2@go-world.cn.Thank  you!