The One's Media 8 disc case is a very sleek looking case that will help you trim the excess space eating CD cases from your shelves. At 16mm of thickness, it is significantly more compact than regular 12 disc CD cases. Instead of traditional plastic trays, this case uses an ingenious 2 ring locking system. When combined with the three double sided disc sleeves, the 2 ring locking system makes organization and rearranging a breeze. It is made from a 100% polypropylene substance that gives the case its surprisingly light weight. Finally, our fantastic DVD case is outfitted with a clear outer sleeve.