Master mechanic, gallon, 50/50 extended life long life formula, ready to use, convenience & protection all in 1, a 50% mixture of antifreeze & water, compatible for use in all automobiles & light duty trucks, regardless of make, model, year or original antifreeze color, provides 150,000 miles or 5 years of maximum protection when a complete cooling system flush & fill is performed, features a phosphate free & silicate-free formula, meets astm d-3306, astm d-4340. Color is yellow.