Thank you for taking a look at our American made Skid plates for Audi B8 and B8.5 Cars A4 A5 S4 S5 2009-2016. The skid plates are Made of 5052 4mm thick Aluminum. All necessary hardware is included along with complete instruction sheet. We at Four Rings Auto Service and Sell Audi and VW we saw a need for a better solution to the stock plastic skid plate that break or get ripped off if your car is lowered or hit something. This skid plate helps protect against that.