The MB556 Series perfect for duplication industry that needs CD/DVD or Hard Drive with fast interchangeable ability. With our MB556 Series you will be inserting or exchange CD/DVD drive without disassembles your case. MB556 Series is known commonly that intensive and rigorous use of optical drives begin to wear and tear down and taking the time to reinstall a new drive is just too much in time consuming, causing productivity to stall. Meet the next generation of disk duplicator case that will raise drive maintenance to a whole different level. Designed with drive longevity in mind using aluminum cool casing plus up to three warm air outtake cooling fans your drives are sure to run comfortably within the enclosed environment. The extractable drive trays allow removal and replacement of any defective drive fast & easy, cutting down all unnecessary labor and heavy burdens of duplicator maintenance