The H3 Chevy Express Van Racks from Vantech are low profile racks that don't require drilling for installation. The drip rail clamps secure the mounting bases to existing drip or gutter rails. Mounting bases are 8" wide and shaped to fit 1996-2013 Chevy Express vans. The 3mm thick mounting bases feature two eye hooks for tie-down straps. Included rubber seats act as a buffer between mounting bases and drip rail clamps, eliminating metal-on-metal contact. Available in sets of two and three, the bars are powder coated in your choice of black or white. The aerodynamic cross bars are constructed of extruded aluminum with channels for installing and adjusting accessories. Accessories are installed by attaching to included sliders that are secured within the aluminum channels. Included end caps prevent wind noise and water build-up. The H3 Aluminum Vantech Chevy Express Van Rack is one of the lowest systems with a clearance of 7" in height.