MaxxHaul 70423 Universal Aluminum Truck Rack - 400 lb Capacity Horizontal and vertical posts are constructed from durable no-rust aluminum material. Base brackets are made from heavy duty steel for strength with powder coat finish Internal Reinforced Structure on Crossbar for Increased Strength with a Maximum Distributed Load Capacity of 400lbs Crossbar Extends up to 70" Long to Fit Most Truck Beds with Supporting Uprights Measuring at 26" in Height Includes Adjustable Cargo Bumpers Near the End of Each Crossbar to Prevent Cargo from Sliding During Stop-and-Go Transition Easily mounts onto a pickup bed rail system with drilling as an option (not required)