Features:
The water tank cover with meter is not only to prevent the water tank from leaking, but also to adjust the pressure balance of the water tank and maintain the water level balance of the water tank;
As the water temperature rises, the cooling water begins to expand. Once the pressure relief value is exceeded, the spring of the water tank cover will open, and the cooling water will flow to the auxiliary kettle of the water tank for storage;
On the contrary, when the water temperature decreases, the volume of water becomes smaller, and a vacuum is formed in the water tank. At this time, the water tank cover will also be opened to suck the water of the auxiliary kettle back into the water tank to keep the water level balanced.
Made of billet aluminum material for strength and durability.
Combines a radiator cap with a temperature gauge.
Measure coolant temperature to tell if it is safe to open the radiator cap.
With red silicone seal for better adaptation.   
Direct bolt-on installation.

Specifications:
Pressure:1.9/1.1/1.3 BAR(optional)
Size: as shown
Color: Blue
Material: Aluminum Alloy+ABS

Package Included:
1*Thermostatic Radiator Cap(optional)