High-quality materialsThe thermostatic radiator cover is made of high-quality silicone rubber, which has good sealing performance and can effectively prevent water leakage from the radiator. This is a high quality product Professionally madeAs the water temperature drops, a vacuum will form inside and the cover will open to draw water from the auxiliary heater into the water tank to keep the water level balanced Professional UseThe thermostatic radiator cover is professionally made and designed to adjust the pressure of the radiator and maintain the water level in the water tank Superior performanceThe thermostatic radiator cover is professionally manufactured, which can improve the pressure and cooling performance of the radiator, and at the same time change the appearance of the engine compartment, with superior performanceProfessional DesignConstant temperature radiator cover, once the discharge pressure exceeds 0.9kg, the radiator cover spring will open and the liq Cooling fluid flows to the auxiliary radiator for storage Professionally madeAs the water temperature drops, a vacuum will form inside and the lid will open to suck the water of the auxiliary heater in the water tank to keep the water level balanced High-quality materials The cover of the thermostatic heater is made of high-quality silicone rubber, which has good sealing performance and can effectively prevent radiator water leakage. This is a high quality product Specification: Item Type: Thermostatic Radiator Cap Material: Aluminum Alloy + Silicone Rubber Color: Dark Blue + Black Size: Approx. 65 x 45mm / 2.6 x 0.8inch Application: Universal Package List:1 x Thermostatic Radiator Cap