1Function: Effectively withstands overheating and vibration, also helps reduce oil dilution, fuel consumption, exhaust emissions, and improves heating system efficiency. 2Excellent Performance: Professional manufacturing, exquisite workmanship, high accuracy, stable performance and high reliability. 3Material: The radiator expansion tank is made of aluminium alloy material, which is high temperature resistant, wear proof and durable. 4Leakproofness: Coolant water tank has perfect sealing, keeping a good closed environment and preventing coolant leakage. 5Ideal Replacement: According to the original car size design, perfect replacement of the old or damaged original one, no need to modify, easy and fast installation.