About This 【Size and Material】Our wheel chocks are made of high-quality rubber and have substantial weight to keep the car in place without being too heavy to move around. The size is 4.2" × 4.7" × 8.2" and is perfect for most wheels/tires and utility trailers. 【Multifunction Models】These rubber chocks can be used for a wide range of purposes, perfect for Trucks, Trailers, Small Airplanes, RVs, and more to prevent your vehicle from rolling away.High visibility safety reflective tapes ensure a safe working environment while your vehicles are at rest; triangular three-lobe shape to sorta interlock for easy storage. 【Reflective Strips】Each wheel block has 3 yellow reflective strips, which can ensure high visibility even in low light conditions and is suitable for various environments 【Included】Equipped with 4 ft long high-performance nylon connecting rope, allowing you to block large vehicles such as trucks and trailers and even aircraft tires more easily 【Heavy Duty】Crafted from sturdy rubber, these wheel chocks are built to last, offering slip resistance, weather resistance, and oil resistance. They are designed to withstand heavy use, making them significantly stronger than plastic chocks