These side skirts are designed for car enthusiasts who own a 1990 - 2002 Mercedes SL Class R129. They are great for those who want to enhance the look of their car and give it a more sporty appearance. When you're driving on the street or showing off your car at a car meet, these side skirts will make your Mercedes stand out. They are made of FRP material, which is lightweight yet strong. Each set comes as a 2 - piece unit, and professional installation is needed to ensure a perfect fit.