MetroMax Q Shelving Starter Units consist of four posts and indicated number of
MetroMax Q shelves. Starter units are perfect for when you need maximum
storage space. Add-On Units can be purchased separately to connect to a
starter unit. With MetroMax "S" Hooks, save time and money by
eliminating adjacent posts. Add-On Units come with two "S" Hooks per
shelf for easy installation. For questions, help, or comments, call 1-800-325-5522 for assistance