Vantech 2-Bar White Aluminum Clamp-On Ladder Rack System Mercedes Sprinter 2002-2006 Low Roof Model H2151WVantech 2 Bar White Aluminum Clamp On Ladder Rack System Mercedes Sprinter 2002 2006 Low Roof Model H2151W 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 uprights