This is an HPE LTO-9 Ultrium data cartridge, a magnetic tape cartridge used for large-scale backup and archival storage in enterprise tape libraries and autoloaders. LTO-9 has a native capacity of 18TB per cartridge; the "45TB" figure in this listing refers to the typical compressed capacity (roughly 2.5:1 compression), standard practice in tape capacity marketing. "RW" indicates a rewritable (not WORM/write-once) cartridge. Unlike the plain non-custom-labelled LTO-9 cartridge elsewhere in this catalog, this is the custom-labelled version — pre-printed with sequential barcode labels (the truncated "(20" in the listing suggests it's supplied as a 20-cartridge pack) so it can be immediately catalogued and tracked by a tape library's barcode reader without the buyer needing to apply labels themselves. Used by organisations running LTO tape backup infrastructure for cost-effective, long-term, offline data retention.