Prepare your semi truck to be Ready for the Road Ahead , with the X-tra Seal Heavy Duty String-Type Truck Tire Emergency Kit that provides advanced preparation for a flat tire. To make sure operators can efficiently patch a tire that has been punctured by nails, rocks, or glass, this kit includes a number of easy-to-use repair components. Fashioned with rugged materials to be suitable for commercial vehicles, tractors, and more. FleetPride is your First Click in Heavy Duty .