Car Roof Mesh Compact Storage Basket with Wind Fairing Low-profile design for a sleek look, basket measures only 4.5" high Mounts to an existing factory or aftermarket vehicle roof rack for transporting cargo with up to 150 lbs distributed capacity Great for hauling camping equipment, sports gear, luggage Aerodynamic wind fairing included to help deflect air up and around cargo Mounts to round bars up to 1.25" diameter, 1-5/8" x 1-5/8" square bars, or 4.375" x 1.625" rectangle bars maximum; , Requires at least 36" spacing between cross bars for even support