Features: 1. Made of high-quality silicone rubber, provides good sealing performance, and helps prevent radiator leaks. 2. Radiator cap helps regulate radiator pressure and maintain the coolant level in the reservoir tank. 3. Enhances radiator pressure and cooling efficiency while improving the appearance of the engine compartment. 4. Thermostatic radiator cap designed to release pressure when it exceeds 0.9 kg/cm²; the spring mechanism opens to allow coolant flow to the overflow tank for storage. 5. As the engine cools and vacuum forms, the cap allows coolant to be drawn back from the overflow tank to maintain proper fluid levels. Item Type: Thermostatic Radiator Cap Material: Aluminum Alloy + Silicone Rubber Color: Dark Blue + Black Size: Approx. 65 x 45 mm Application: Universal Package Included: 1 x Thermostatic Radiator Cap