Black CD SuperCentres with adhesive backing. You are buying the original high-quality SuperCenters. CDs snap onto the hub with a reassuring click, and the paper backer is easily and QUICKLY removed. Packed in bags of 1000, or we can count out the exact number you need. Instructions for use: Press the end of your thumb into the middle of the white backing liner, the edge of the liner lifts away and can then be easily picked and removed before fixing in place. Once the CD centre is positioned correctly, press the centre (not the outer edge) of the CD onto the plastic centre until you hear it click into place.