The Imation 15931 is a universal LTO Ultrium cleaning cartridge. What the universal in the Imation 15931 Universal LTO Ultrium cleaning cartridge signifies is that it is compatible with all LTO tape drives and auto-loaders, therefore it will work with LTO-1, LTO-2 and LTO-3 tape drives and autolibraries. The number of cleanings that you will be able to squeeze out of the 15931 Imation LTO cleaning cartridge is dependant on the drive but the manufacturers, Imation, have provided a rough maximum figure of about 50 cleanings. If you use LTO tapes and LTO tape drives then it is necessary and highly recommended that you use the Imation 15931 cleaning tapes so that you can keep your tape drive at its peak performance.