High Density Silicone Car Emergency Rescue Caterpillar Chain Track for Mud Sand Snow Trap, Mud Sand Snow Trap1. Brand new and high quality 2. Durable and waterproof, easy to use and install when emergency happened 3. It can be used for when your car was trapped in mud, sand and snow 4. It can reduce the friction between tire and caterpillar 5. New design and easy to take, convenient to face different circumstance Specification: General Size 83*22*2cm Weight 3305g Package Weight One Package Weight 3. 24kgs 7. 14lb One Package Size 28cm * 24cm * 22cm 11.