Main Features:Durable in use, high quality material.A perfect replacement for your car.The radiator cap tank cover with water temperature gauge can not only prevent water tank leakage, the greater role is to adjust the water tank preure balance.The tank cover can keep in constant preure system.Keep the coolant system in high or low temperature will not lack of water.Specification:Material: Silicone+ Aluminum alloyColor:BlueSize: 0.9bar / 1.1bar / 1.3barType:Big Head/Small HeadPackage Included:1 Pc Radiator CapNote:Please allow 1-3cm differences due to manual measurement.Due to the difference between different monitors,the picture may not reflect the actual color of the item.Thank you!Not only prevent the water tank from leaking, but also adjust the water preure balanceThere are two models, you must confirm the size of the original car tank cover and then buyTurn the water tank cover counterclockwise,if you can't take it , please pre the water tank cover and then turn it.It should be able to remove it.It is forbidden to take the lid when the water is .If it is sprayed on the body, it will cause burns.