Jeep® Performance Parts Rock Rails are both functional and decorative and this design includes a rub rail made of Black, powdercoated steel. These are designed to meet the demands of the off-roader and provide added vehicle body protection. They are fabricated using zinc-coated steel for superior corrosion resistance and roll-formed. The outer surface is e-coated providing superior protection and durability. Rock Rails designed specifically for your four-door Jeep Wrangler (JL).Rock Rails are constructed of Heavy Gauge Steel to take on the toughest trails. These Rock Rails are fully functional and provide rocker panel and lower body-side protection. Not compatible with Running Boards. Features a Textured Satin Black finish that meets Mopar corrosion standards.