Function: The function of the water tank cover is not only to prevent the water tank from leaking, but the larger role is to adjust the pressure of the water tank and maintain the water level of the water tank. Make sure the temperature of the water tank: Replacing the temperature-safety water tank cover allows you to accurately know the temperature of the water tank without having to start the engine. Innner plug: The silicone inner plug can increase the heat-resistant temperature and enhance the tightness of the water tank cover. Durable material: Made of aluminum material, durable and hardness. Combination: Combines a radiator cap with a temperature gauge. There are 6 specifications to choose from. 1. Small head 0.9 2. Small head 1.1 3. Small head 1.3 4. Big head 0.9 5. Big head 1.1 6. Big head 1.3 Weight: 83g color: blue Material: ABS+ aluminum alloy Quantity: 1pcs Packing list: 1*Car water tank cover Only the above package contents are included, other products are not included. Note: Reflection of light and different monitors may cause the item's color to be slightly different from the actual item. Measurements allow +/- 1-3 cm.