This coolant expansion tank from Topaz is designed for use in 2004-2007 BMW E60 and E61 models. It comes with a screw-on mounting style and includes a cap. The tank has a patent part that ensures no drilling or modifications are needed for installation. The material used to manufacture the tank is plastic. The tank has been designed for use only in the specified BMW models and is not a universal fitment. It is a vintage part and is not a performance part. The item is listed under the categories of Expansion Overflow Tanks, Engine Cooling Components and Car Truck Parts Accessories Motors. The manufacturer part number is 17137542986KM, and the interchange part number is ES#38488. Exact item is shown. This is new without the original packaging, which was damaged in transit. Includes the cap shown. No returns if installed. Please review our business policies in our store for information regarding returns, shipping and warranties.