The product is a genuine OEM master cylinder with reservoir for a 2011-2018 Porsche Cayenne turbo, with the manufacturer part number 7P0611303A. Made of aluminum with a bore diameter of 1mm, it features a direct fit for easy replacement. The master cylinder comes with a brake booster included and is a high-quality component manufactured in Germany by Porsche, ensuring proper functionality and durability for your vehicle. D112