cdProjects DS20 CD/Booklet Bubble Sleeves (20 CD Capacity, 1 CD per Sleeve) (Discontinued by Manufacturer) Sleeves fit into any cdProjects product that uses the BubbleSleeve clipping system Pack of 20 refill sleeves Double-sided sleeves hold a CD on each side, or CD on one side and booklet on the other Patented BubbleSleeves reduce contact with CD surface by 50 percent Clipping BubbleSleeves offer protection and convenience