MASTER Cooling set. with which it is possible to test the majority of cars moving on Estonian roads. With the help of the kit, leaks in the cooling system can be quickly found. The pressure drop is carried out by pressurizing the system. observing the pressure drop from the respective manometer. 0-2.5 bar. In case the leak cannot be detected with this kit, it is reasonable to carry out the testing using a CO leak detection kit.