PitStop 5.1 brake fluid is perfectly designed to suit the needs of Avid hydraulic brake system. DOT-5.1 non-silicone formulated hydraulic brake fluid. Designed to maximize the performance of Avid brakes. DOT 5.1 has a higher boiling point than DOT 3 and 4 fluids. Vacuum sealed. Compatible with all SRAM and Avid hydraulic disc brakes.