Sun StorEdge(TM) L8500 500 cartridge slot expansion. Increases the cartridge count in the library from 6500 to 7000 slots. Must have or order 1st, 2nd, 3rd & 4th expansion module (SG-XL8500-1EXM or SG-XL8500-1EXM-NR, SG-XL8500-2EXM or SG-XL8500-2EXM-NR, S
