Finish Line DOT 5.1 Brake Fluid 4oz/120ml is formulated specifically for bicycle brake systems & features a no compromise leading edge chemistry to provide superior fluid life & braking performance. Finish Line DOT Brake Fluid meets the most stringent 5.1 specs & is an approved replacement fluid for braking systems requiring DOT 3, 4, & 5.1. Finish Line DOT 5.1 Brake Fluid features a super low viscosity to yield superior lever response, pad retraction, & consistent performance through a full range of operating temperatures. Features Specifically engineered for use in bicycle hydraulic disc brakes Provides maximum fluid life & braking performance, even at low temperatures Prevents foaming & overheating Meets DOT 3, 4, & 5.1 specifications