Features Perfect for long road trip with a large group of people or friends Heavy-duty bottom metal bars Heavy-duty sturdy steel construction Easy to assemble Bottom metal bars and side rails help keeping your belongings in place while providing plenty of tie down points Steel wind fairing decreases wind resistance and noise Extra Large size and capacity compare to others **Does Not Fit Convertibles* Specifications Color: Black Material: Steel Weight Capacity: 150LBS Wind Fairing Dimension: 33.5" x 7" U-Bolt Spacing: 3.25" wide x 1.375 Overall Dimensions w/No Extension: 43"(L) x 39"(W) x 6'(H) Overall Dimension w/ Extension: 64"(L) x 39"(W) x 6'(H) Package list Universal Roof Rack with Extension Hardware Set Note: If you need to use it in raining day, you'd better seal every joint and screws with black silica when assemble it and also over every opening of the welds, then you can spray the whole thing with a truck bed liner.