Turn a single jewel case into a double CD case using our unique, patented 2-CD Smart Trays! The hinged flip-tray holds one disc on either side and fits any standard jewel case. If you are looking for unassembled jewel cases, please check ourMulti-Disk Jewel Casescategory. View a tutorialon how to use the 2CD tray tostore twice as many cds in the same space!