Features and Benefits:Contains 28 16 oz. bag's of Counteract Balancing Beads;Only balancing product on the market proven to increase fuel economy! Only balancing product with documentation to prove it;TPMS Friendly, Extend Tire Life, Decrease Vibration, Balanced for the life of the tire, No Wheel Weights, Eco-Friendly.;Counteract does not void any tire warranties and does not break down inside the tire. Trust the experts, we have been manufacturing the same product for 20 years. Do not be fooled by inferior copy products.