Key Benefits - Lightweight and easy to use: built from a special material for simple handling and reliable performance. - Weatherproof and leak prevention: designed to replace worn accessories and help prevent leaks. - Tool-free installation: no tools required to install; simply replace the old cap with the existing cap on the washer fluid reservoir. - Durable design for driving conditions: special process design and materials to help maintain stability and controllability while driving. - Reliable sealing: when properly installed, the cap helps maintain air-tightness under normal conditions and prevents coolant leaks. Product Material and Design - Special process design and manufacturing from select materials to support stability during driving and ensure vehicle controllability. Installation - No tools required. Remove the old cap from the washer fluid reservoir and attach the existing cap on the washer fluid reservoir. Please verify that the cap seals well. Installation is complete. Function - The cap maintains air tightness under normal conditions and effectively prevents coolant leaks. Use Scenarios - Replacing a worn or damaged cap on a windshield washer fluid reservoir during routine maintenance. - Vehicles exposed to changing weather where a weatherproof cap improves reliability and protection. - Fleet maintenance requiring quick, tool-free cap replacement to minimize downtime.