Black Locking Luggage Box/ Car Top Carrier 

Used Thule Spirit 1600.  Good Condition.  16 cubic ft.  Aerodynmaic shape.  It holds quite a bit. It is securly attached to crossbar on roof rack by mounting gear (included). Can only be mounted from the inside of the box. Opens on either side, so you can access your luggage on either the driver's side or the passenger's side. Provides more space for comfort in the car.  It could also be a great place to hide gifts (if you are traveling for the holidays with your family).     If I still had my van, I would not be selling it.