Rock DOT 4 Universal Hydraulic Brake & Clutch Fluid Rock DOT 4 is a high quality brake and clutch fluid, blended from superior materials to a high standard of purity. Features Suitable for use in all motor vehicles and motorcycles made in the UK, USA, Europe and Japan It cannot be used in Citroen or other vehicles requiring mineral based fluids Mixes safely with the SAE J1703, DOT 3 and DOT 4 brake fluids Rock DOT 4 is designed to meet the stringent demands of the following specifications: SAE J1703, SAE J 1704 US FMVSS 116 DOT 4 AND DOT 3. ISO 4925