Material Made from sturdy, flexible plastic that stays durable over time and resists cracking. Key benefits Prevents leaks and spills by sealing the windshield washer fluid reservoir and tank. Keeps the washer system ready for use, reducing maintenance and roadside concerns. Simple replacement to restore normal operation quickly. Easy installation and use Tool installation: remove the old cap and snap this cover into place. Quick to install with no special tools required, saving time and effort. Performance and durability Designed to provide a tight seal in varying temperatures and conditions, supporting reliable washer system performance. Use scenarios Routine maintenance: a worn or damaged cap to restore proper sealing. Road trips and long drives: prevent fluid leaks and keep the vehicle clean and ready for use on the road. Seasonal upkeep or fluid ups: swap in this cap for a fast replacement during maintenance. Note This is a replacement cap for windshield washer systems. Please ensure compatibility with your reservoir model before use.