TDK 52x CD-R, 25 Pack Spindle TDK 80 minute CD-R discs set the new standard for Music and Data Storage TDK Certified 700mb/80-minute write-once CD-Rs offer high-density storage and superior Audio Recording TDK CD-R discs are high-reliability, high-durability media that incorporate the latest TDK technologies, including ISOPURE recording dye technology using a re-tuned MSi (metal-stabilized cyanine) recording material for higher sensitivity and improved Reflex Mirror Tuning reflective layer technology These discs are packaged on a spindle, not in individual jewel cases Compatible with virtually any computer-based CD-R drive, but are not Formatted for Consumer Audio Component Disk writers