Extruded aluminum. max load capacity of 150 lbs per bar. cross bar length: 50'' powder-coated aluminum components provide strength and durability. color options available in sandy black & gloss white aluminum system with stainless steel hardware thinner crossbar and lower mounting base than the ax302 series. mounting base is made of gauge 7 (3.5mm actual) aluminum specifically designed for ram promaster city 2015-on
