These tapes feature a metal evaporated layer of 100% pure cobalt and optimized "DLC" Diamond-Like Carbon coating which results in high durability & maximum runability in the tape transport as well as a special surface treatment & finishing process which reduces drop out rate of DVCAM by 50% over consumer DV tapes.
Sony says: Why authorized media matters? It's your reputation.
Note: This video explains the importance of using Sony media bought through authorized sources for your video projects, when to question the reliability of product in tampered cartons and how to locate an authorized Sony pro media dealer.