Combining modern aerodynamics with old-school muscle, the new CoreBar is the first aero bar built with roll-formed steel's strength, utility and durability. The JetFlow™design is wind-tunnel tested to reduce drag for less wind noise and better fuel economy, and the galvanized steel delivers proven load-bearing performance. Product Features Wind tunnel tested JetFlow™ teardrop shape is strong, quiet and exceptionally aerodynamic. Roll-formed galvanized steel holds the load. Sleek aerodynamic design looks awesome on your car’s roof. Vinyl-wrapped for durability and corrosion resistance. Includes CoreBar SL Adapter to integrate with all StreamLine System Towers. Available in 4 sizes: SM (50”),MD (60”), LG (70”) and XL (80”). Product Specs Weight: 9.00 lbs. Dimensions: L 50.75 in x W 2.75 in x H 1.10 in. Limited Lifetime Warranty.