The removeable drive bay cover easily slips on to protect your drives when they're not in use. Plus, it provides a neat, clean appearance that will help your Northrop Computer Ultimate PC fit into any room or decor.* Please note, the drive bay cover is made from the same aluminum material, and is the same color as, the rest of the PC. Because of the reflective properties of the metal, photographs can make the drive cover appear to be a slightly different tone.