For your 1l coolants & 1l high performance wind screen washer. the purpose of this products is to reduce the number of broken -down vehicles and rampant perishing lives on roads due to overheating and unclear visions. vehicles catches fire when the engine overheats causing wires to melt; this happens when the cooling system is not properly working or when there is not enough coolant in the radiator. although overheating of vehicles could be resolved through many means , the use of appropriate engine coolant is the best