The Thule WingBar Edge Complete Roof Rack Kit includes all you need to get ready for your roadtrip! Two load bars & four feet are included in each kit, and some also have a fit kit. TheTrailEdge design looks good along with making aerodynamics better by allowing clean air seperation from the bar. The SmartSlides have a dual purpose, by providing an under - bar aerodynamic cover & and making installation easy. The end caps rotates to allow access to the t - slot tracks in the bars makes adding accessories easy. This allows you to install a wide variety of accessories, including bike racks, kayak racks, and cargo racks. The bars are available in both silver or black, depending on what you prefer. When the rack isn't in use, accessories can be removed just as easily. Sturdy and easy to use, this load bar will give you the mounting options you need for a day at the trail or long road trips. Thule stands behind the WingBar Evo Complete Roof Rack Kit with a lifetime warranty.