Granville Brake Fluid DOT 4 is a heavy duty synthetic brake fluid formulated for modern vehicles and is suitable for vehicles with ABS systems. Brake Fluid DOT 4 is a synthetic formulation which will mix with Brake Fluid DOT 3. Not suitable for vehicles with ESP systems fitted. Specifications: DOT 4 & DOT 3 SAE: J1703 & J1704 FMVSS 116: DOT 4 & DOT 3 ISO: 4925 Class 3 & 4925 Class 4