Double-sided Hanger Sleeves are the perfect add-on for your aluminum cases. from 300 to 1000 disc capacity cases - you will always need double-sided hanger sleeves to meet your needs. These sleeves are made of virgin polypropylene (PP) and are extremely durable. This is great for holding 2 CD/DVD discs on each side of the sleeve. Each strip comes blank so you can fill out/ type/ or write the numbers or descriptions you choose at your own convenience. Check out our 300, 800, 1000 CD/DVD Aluminum Cases and add them to your collection. Comes in packs of 100.