Sun StorEdge(TM) L8500 500 cartridge slot expansion. Increases the cartridge count in the library from 9000 to 9500 slots. Must have or order 1st, 2nd, 3rd, 4th, & 5th expansion modules (SG-XL8500-1EXM or SG-XL8500-1EXM-NR, SG-XL8500-2EXM or SG-XL8500-2EX
