Features and Benefits:Kit includes 4 x 6oz Drop-In bags of Counteract OFF-Road (24oz), 4 x Vortex Valve Cores, 4 x Valve Caps, Valve Core Remover, Injection Bottle & TubeLasts for the life of the tire! either drop the bag in while mounting the tire, or install via the valve stem!Perfect for eliminating vibrations between terrain variations.Made in the USA, TPMS Friendly, Extend Tire Life, Decrease Vibration, Balanced for the life of the tire, No Wheel Weights, Eco-Friendly.Make sure to refer to the application chart before purchasing.