Construct a continuous industrial storage system against a wall in your warehouse by attaching this additional racking to standard duty single sided cantilever rack starter units. *Please note, the selected arm type below may differ from the style displayed in the product image. Attaches tostarter unitto extend existing storage space 3 straight or inclined arms, with or without lip Arms are adjustable on 3" centers Needing individual components? BrowseHERE.