This is a 2oz bottle of Traxxas Silicone Shock Oil. Available in a variety of fluid weight options, this 100% pure silicone oil will allow you to tune the damping characteristics of the shock to suit a variety of conditions.
The Traxxas 5032 Silicone Shock Oil 30wt, 350cSt, 60cc would be a great fit for enthusiast model car racers who want a high-performance alternative to traditional shock oil.