Description: 【Heavy duty】: Made from heavy duty rubber, Jack Wheel Chock designed to provide long term protection for your vehicles wheels 【Size】: Jack Caster Wheel Dock Measuring 16.8cm x 12.9cm x 4cm, these xx effectively prevent wheels from rolling or sinking on soft appearance by evenly distributing weight 【Enhanced Stability】: Rubber Jack Caster Wheel Dock Prevents lateral movement of RVs when stationary, ensuring your vehicle remains securely in place 【Reliable Solution for Trailers】: Wheel Chock Stabilizer Addresses trailer tongues issues by offering enhanced reliability and stability during parking or storage 【Versatile Use】: Wheel Stopper Ideal for use with trailers, RVs, boats, jet skis, and caravans; easy to use and essential for safe parking on various terrains Specification: Material: Rubber Size Chart: 16.8cmx12.9cmx4cm/6.61x5.08x1.57inch Package Includes: 1 Jack wheel chock Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.