MAM-A 80m Silver thermal in Jewel Case - 10 Pack 100 year Shelf Life MAM-A Exclusive "Diamond-Coat" Finish - Eliminating fingerprints & scratches on disc surface. Recommended for Pro Audio & High Use Archive Recording The MAM-A Phthalocyanine dye is the most resistant to light and heat. Ideal for high-use audio. Jewel Case Packaging