Vantech 2-Bar Black Aluminum Clamp-On Ladder Rack System Mercedes Sprinter 2002-2006 High Roof Model H2153BVantech 2 Bar Black Aluminum Clamp On Ladder Rack System Mercedes Sprinter 2002 2006 High Roof Model H2153B The Vantech H1 aluminum system can hold up 500 lbs. 2 bars evenly distributed. The Cross bars is 2 X 1 reinforced extruded aluminum with built in channels. The Cross bar is protected by a non slip rubber bar guard on top that is easily pressed into the channels. The aluminum mounting upright is approx. 1 8 thick at the base. The mounting