Diesel exhaust fluid is a urea solution It is manufactured locally using German technology It is stored in a tank separate from the diesel tank and is filled It simply injects the fluid into the exhaust system to React with harmful nitrogen oxides NOx and convert them Into nitrogen N2 and water H2O. This technology was Used for trucks several years ago and has proven successful It is now mandatory for all diesel engines, whether Trucks or passenger cars *It is mandatory because the smoke that comes out is a pollutant to the environment and is subject to a violation* 10 liter gallon 90 SAR 20 liter gallon 150 SAR Delivery and shipping available at a nominal price