Built with 100% aluminum and designed to allow you to get most out of your vehicle, this component of the TracRac system will help you safely carry ladders, lumber, kayaks, or other items. Make the investment and go out and enjoy the possibilities it provides you. Click here??for Fit Guide. . . This product will be shipped directly from TracRac and will leave their factory in 2-3 business days. Eligible for ground shipping only. . . . Made from 100% aluminum. . 1 of 2 items needed for the Sliding TracRac System. . Base Rail for super duty long-bed trucks. . Black anodized finish. . Unique 3 T-Slot design allows racks and accessories to slide independently. . Damage-free compression stake pocket mount system. . Includes 2 base rails and mounting hardware. . 721260210113 28551900006 21011