ARIES Jeep inner fender liners begin with an all-aluminum construction. Unlike plastic liners, aluminum fender liners offer enhanced strength to resist the barrage of offroad elements, including sticks, gravel, mud, snow, sand and much more. Also unlike steel fender liners, ARIES aluminum fender liners will not rust. To maximize corrosion resistance and durability, we cover them in a tough carbide black powder coat finish. This not only protects against rust, but it also helps withstand the inevitable scuffs and scratches accumulated on the trail.