Finish Line DOT 5.1 Brake Fluid - 4oz. Specifically engineered for use in bicycle brake systems and is compatible with all current brakes. It has a super low viscosity that provides great lever response pad retraction and consistent performance through a full range of operating temperatures. Prevents foaming and overheating Exceeds the most stringent 5.1 fluid specifications Provides maximum fluid life and braking performance even at low temperatures