【Made to Last with Premium Rubber Material】 Our Chock is made from premium nitrile rubber material in a one-piece molding, making it super heavy duty and resistant to oil, water, gasoline, propane, and hydraulic fluids. Rest assured that your Jack Wheel will be protected for years to come. 【Ultimate Protection for Jack Caster Wheels】The heavy duty Chock is specially designed for Jack Caster Wheels, providing ultimate protection and preventing rolling or sinking into soft ground. It also ensures stability once your caravan is in its stationary position, making it the perfect solution to your trailer tongue problems. 【Extend the Service Life of Jack Wheels】Place the Chock underneath your Jack Wheel to prevent damage from mud, sand, oil, and dirt. The drainage hole effectively prevents rainwater build-up and rust damage. With the jack wheel chock, your Jack Wheel will stay clean and its service life will be prolonged. 【Odorless and Easy to Store】Treated with high temperature vulcanization, our chock is durable, odorless, and nontoxic. It can endure extreme outdoor temperatures without losing its effectiveness. With a portable size of 6.6 x 5 x 1.38 inches, it is easy to store in your car for convenience. 【Durable Wheel and Rubber Chock】Our Chock features a durable poly wheel and a heavy-duty rubber chock, providing long-lasting corrosion resistance and ensuring the stability and safety of your trailer. Product Highlights: 1. Heavy Duty and Reinforced Design: Our Komokeru Jack Wheel Chock is constructed with premium-quality reinforced rubber, making it highly durable and able to withstand heavy loads. The strong and sturdy design ensures that your caravans, trailers, and other vehicles remain securely in place, providing ultimate stability and safety during parking or hitching. 2. Compatible with 6-inch Jockey Wheels: Designed specifically for 6-inch jockey wheels, our Jack Wheel Chock provides a secure fit and effective support. The precise sizing ensures that the chock fits snugly around the wheel, preventing any unwanted movement or rolling. 3. Easy to Use: Our Jack Wheel Chock offers user-friendly convenience. The compact and lightweight design allows for easy storage and transport. The built-in handle provides a comfortable grip, making it effortless to position the chock in place. The simple and straightforward installation process saves you time and effort. 4. Versatile Application: Our Jack Wheel Chock is suitable for various scenarios and surfaces. It can be used on different terrains, including concrete, gravel, dirt, or grass. Whether you are parked on an incline, at a campsite, or on uneven ground, our chock stabilizer provides reliable support and stability. 6. Enhanced Safety: Our Jack Wheel Chock is a crucial safety accessory for caravans and trailers. Preventing unexpected movement or rolling, it significantly reduces the risk of accidents or damages. Enjoy peace of mind knowing that your vehicle is securely held in place with our reliable wheel chock.