SquareDealOnline - CD2R80SMDG - CD Smart Trays - Slimline - 2 Disc Hinged - Black (25-Pack) Turns Any Standard 10mm CD Jewel Box into one that holds 2 Discs with it's special hinge! Can Turn a 24mm double CD case into a 4 CD case! Also, will turn any 4CD Chubby Jewel Box into a 6CD Chubby Jewel Box by replacing single outer trays with these SMART Trays!