ITEM NAME:Car Thermostatic Gauge Radiator Cap 1.3 bar Small Head Water Temp Meter dgs VPK Descriptio n Features: 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. Function: The water tank cover is not only to prevent the water tank from leaking. The bigger role is to adjust the pressure balance of the water tank and keep the water level of the water tank balanced. As the water temperature rises, the cooling water begins to expand. Once the pressure relief value is exceeded, the water tank cover When the spring is opened, the cooling water will flow to the water tank to store the water; on the contrary, the water temperature will decrease, the volume of the water will become smaller, and a vacuum will be formed inside the water tank. At this time, the water tank cover will also open to suck the water of the auxiliary water bottle back to the water tank to maintain the water level balance. Specifications: Material: ABS + aluminum alloy Colour: 1.3 (big head) Size: 6.5*4.5cm Pressure: 1.1bar Package List: 1 * car modified high pressure water tank cover We offer you what you need! Car Thermostatic Gauge Radiator Cap 1.3 bar Small Head Water Temp Meter.The water tank cover is not only to prevent the water tank from leaking. The bigger role is to adjust the pressure balance of the water tank and keep the water level of the water tank balanced. As the water temperature rises, the cooling water begins to expand.