A grade quality. Optimum CD-RW offers 700MB or 80 minutes of re-writable storage capacity. Professional users use Optimum CD-RW discs to meet their highest standard of disc read/write performance, reliability, and archival life. Optimum CD-RW media is compatible with drives made by HP, Philips, Dell, Sony, and other leading drive manufacturers. Optimum offers high-quality, highly reliable qualified media.