This package contains high quality pure 100% silicone shock oil especially designed for the serious RC racing enthusiast. This Pro Racer Silicone Shock Oil is designed to maintain consistent weight even during extreme changes in temperature. Available in various weights to fine tune your suspension. Comes in a 2 ounce bottle. Weights available are 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, and 70. This package contains 40 weight oil.