SONY Blu-ray Discs 50 Spindle - BD-R 25GB 6X (2011) Blu-ray phase-change recording film uses inorganic disc less susceptible to ultraviolet rays "hard coat" hardened protective film to prevent scratches proprietary read-write errors that cause adoption Capacity: 50GB / Speed: 1-6X White top, Inkjet printable (22mm-118mm) Quantity: 50 Discs Spindle (no Jewel Cases)