This universal car water tank pressure gauge set is very helpful on troubleshooting and saves money and time. If there is a small leak in cooling system, or if you add coolant without vacuum, it can cause many problems or even a damaged engine. So, this kit is much cheaper than the maintenance cost or getting a new engine. Additionally, it is organised in a case for easy storage and transportation. Please note:1. Only used for detecting the cooling system leaks. Do not do the other purposes.2. Make sure the water tank is cooling off before opening the water tank.3. If any damaged, do not use.4. Do not wear watches, jewelries or loose clothes when using.5. Process at places with good ventilation.6. No Smoking during operation.7. Do not put the accessories on the engine.