DOT 4 - A refined specification poly-glycol fluid as fitted to most faster street bikes produced now
DOT 5 - Silicone fluid as used in Harley-Davidson® motorcycles and many special high-performance brake systems
BF307 - Highly refined DOT 3 brake fluid, ideal for racing or high-performance road bikes; can be used in all systems specifying DOT 3 but not with silicone