These sturdy cross bars are one component of an Inno car roof rack - they span your vehicle's roof providing a sturdy platform for cargo, luggage, bikes, or other sports equipment. Each pair of bars requires a set of bases to create a complete rack. Different base feet are available depending on your vehicle. Inno square load bars are made of hollow galvanized steel, with a tough black coating for long lasting durability. Backed by Inno's Lifetime Warranty. Manufacturer's part number: IN434A
Great for across the bed of my Toyota Tundra. They look like they bow a little in the middle when under weight. Not enough to be an issue, but enough that its slightly noticeable when I look at it. Overall very happy with them. I have two Yakima Frontloader bike racks mounted on them. Very stable.