Features: Durable construction, this part is made from quality materials to ensure reliable performance and long service life. Made of premium-plastic construction to prevent the water in the fluid reservoir overflow, ensure your driving safety. Easy installation. Remove the old washer reservoir cap, then install the new cap on the washer reservoir. Make sure that it will be properly fitted and sealed on the washer reservoir to avoid any leaks. Made of premium-plastic construction to prevent the water in the fluid reservoir overflow, ensure your driving safety. Remove the old washer reservoir cap, then install the new cap on the washer reservoir. Make sure that it will be properly fitted and sealed on the washer reservoir to avoid any leaks. Specifications: Material:Plastic Inner Diameter:Approx.5.3cm/2.08inch Part Number:86615AA060 Color:Yellow For MK1 MK2 MK3 Package Includes: 1x Reservoir Tank Bottle Cap note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.