DOT 4 - A refined specification poly-glycol fluid as used in fluid as fitted to most faster street bikes now produced
DOT 5 - Silicone fluid as used in Harley Davidson motorcycle 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