Material The water tank bottle lid cap is made from quality plastic materials, providing strength, durability, wear resistance, and long life in typical vehicle cooling system use. Function Scratchresistant and corrosionresistant for extended service life. It serves as a direct replacement with easy installation, and the cap is flexible and secure once fixed in place. Design Designed to provide efficient sealing to prevent coolant leakage, helping to reduce the risk of engine overheating or damage from leaks. Supports the cooling system's reliable operation and helps protect the engine, potentially prolonging its service life. Easy Installation Engineered for quick, hassle replacement with no special tools required. Simply screw the cap into place to an old or damaged cap, saving time and effort. Compatibility and use scenarios Routine maintenance: a worn or damaged radiator cap to restore proper sealing and maintain cooling system performance during regular vehicle service. Leakage prevention: Fit when there are signs of coolant seepage around the cap area or when the cooling system shows potential leakage, helping to maintain engine temperature. Seasonal or preventative checks: Use during seasonal inspections to ensure the cooling system remains sealed and to minimize the risk of overheating in extreme temperatures. Notes Designed as a direct replacement for standard cap openings, offering straightforward, tool installation and reliable performance without altering vehicle specifications.