This 7-Bike Capacity Wave Bike Rack is constructed from heavy-duty 2-3/8" diameter steel tube that is fully-welded into a solid one-piece design. A durable powder coated gray finish protects from rust and corrosion. Able to accomodate up to 7 bikes at a time. Pre-drilled holes in the base plates allow for easy surface mounting to concrete surfaces. Check out all of the Bike Racks options we have in available in our catalog.