PART NUMBER: BL-ZJ03 in your SONIC user manual SUPERIOR PERFORMANCE: It easily absorbs shocks from jump and rough terrain It supports the car from unexpected dropping and unstable ground surface, so you can enjoy the toy car for a longer period OIL-FILLED SHOCKS: The lubrication improves the overall performance of the shock absorber EASY TO INSTALL: Fits perfectly on SONIC truck because it is an original accessory of SONIC RC car QUALITY GUARANTEE: It is made of high-quality material, brand new and durable