Selling off a stack of used LTO-4 tapes from various manufacturers including Dell, TDK, Quantum, and Tandberg Data, These were used before upgrading to an LTO-6 drive, and overwritten before decommissioning. My best guess is that they have been written 60 or so times each, end to end, but that's just a guess and not a guarantee. Buy more and get a discount. I'll ship them together in one box if you buy more than one.