TDK Jewel Boxes Multi Color 10-Pack 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 They are compatible with virtually any computer-based CD-R drive, but are not formatted for Consumer Audio component disk writers