Easy to Use - ABC’s drop-in bag can be installed through the valve stem in 5 easy steps without removing the tire and wheel from the vehicle. Contents or “kit” includes 2 - 10oz bags of our premium glass balancing beads, 2 valve cores, and 2 valve caps — the best tire accessory for your medium-sized truck. Extend Tire Life - The tempered glass balancing beads provide a completely balanced axle end extend the life of your tire help with the uneven tread, reduce vibration, and keep the tire temperatures running cooler. Smoother Drive - Balance your tires while minimizing vibrations to enhance your truck maneuverability. This must-have automotive accessory improves your driving experience and extends your tires' overall life. Improve Fuel Efficiency - ABC Balancing Beads do more than balance your tires. – Our beads provide enhanced fuel efficiency by a reduction in rolling resistance. Upgrade your DIY tire balancing routine today and experience the benefits of improved fuel economy. Complete Wheel Assembly Balance - Traditional spin balancing only balances the tire and wheel. ABC beads balance all the wheel end's moving components, including the axle's components, resulting in a perfectly balanced axle end.