Engineered specifically to integrate with the Sienna’ s factory roof rails, Genuine Toyota roof rack cross bars help enhance the vehicle’s cargo management versatility. This set of two fully adjustable cross bars provide additional secure tie-down points for all types of roof rack accessories and can support a maximum of 150 lbs. (68 kg) when evenly distributed across both bars. Built to meet Toyota’s high quality standards for performance and strength, the cross bars’ unique “clamp on” design allows them to be positioned anywhere along the Sienna’s factory roof rails and installed and adjusted with ease. Constructed from durable lightweight aluminum with structural nylon reinforced end clamps, the cross bars feature an e-coated primer and black powder top coat to help protect against corrosion and the elements.