"Get trail ready by fully protecting your 2.5 gallon air tank and factory evap canister with a River Raider Air Tank Skid Plate and brackets for your 2007-2014 Jeep Wrangler. Mount brackets using factory evap mounting location for a secure install. For proper drive shaft clearance, a 2.5" lift or greater is recommended. Available in bare 3/16" steel or 1/4" aluminum, black satin smooth finish or textured epoxy finish. Our aluminum skid system weighs approximately 1/2 the weight of our steel skids. UHMW stands for Ultra-High Molecular Weigh Polyethylene and these 3/16" thick panels are specially designed for sliding over rocks. They can be used with the steel skids, but are not really necessary with the steel. We do recommend them if you are getting the aluminum. Our aluminum skids are made from 1/4" material and will protect your system, but they will get scratched if you wheel them hard so the UHMW protects the aluminum and helps them to slide over the rocks instead of getting scratched up."