Aluminum, and if you scrub the wall, you won't lose it all! You still have the aerodynamics to get you in and out of the corners.Spoilers are available in either a natural mill finish or powdercoated black. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts & Accessories\Exterior Parts & Accessories\Spoilers & Wings". The seller is "dushamm_5" and is located in this country: US. This item can be shipped to United States.