AA-Racks Cantilever Extension for APX25 Pickup Truck Ladder Rack Over the Cab Extension (P-APX25-E)Made of lightweight strong aluminum construction Powder coated finish Over cab style truck ladder rack with side bars The Cantilever mounts to the crossbars and provides 38 inches of additional carrying capacity The genius of this system is that it still allows for all of the flexibility of the Sliding Cantilever System while protecting your cab from potentially unstable loads It is guaranteed compatible with the APX25 Series. The Extension Bar built