material: The bottle cap is made of ABS plastic. Lightweight, anticorrosion, antiscratch, antidust, antiwear, long service life. Plastic offers greater flexibility for longterm use. Easy installation: Designed to original factory specifications. match to the original car. Windshield washer fluid reservoir caps are designed to fit your vehicle and meet your replacement needs. performance: The car windshield washer bottle cap has a water spray mark to help locate the washer fluid reservoir quickly. provides reliable protection for the washer system. Note: The part number is 1488251. Please confirm the OE number carefully before . Use scenarios: Replacing a damaged or missing cap to prevent leaks and contamination during routine vehicle maintenance. Fleet or workshop replacement to ensure quick, consistent fit across vehicles, reducing downtime. Servicing or inspecting multiple vehicles where the reservoir marking helps technicians locate and access the washer fluid reservoir quickly.