AA-Racks Model DX36 Universal Pickup Truck Cap & Topper 2 Bar Ladder Roof Van Rack System Adjustable Steel Cross Bars - Matte White

17 Gauge (1.35mm actual) Steel construction provides 350lb Max. loading capacity 1.2" diameter cross bars; Length adjustable from 35" to 57" 11 gauge (3.2mm actual) high strength steel mounting base *TOPPER/CAP NOT INCLUDED Will fit onto toppers (drilling required for installation)