HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PC

Item Description Spare part number
Blu-ray Disc ROM Drive with SuperMulti DVD±R/RW Double-Layer 599538-001
DVD±RW SuperMulti Double-Layer Drive with LightScribe 599540-001
DVD ROM Drive 599539-001
Battery Latch Kit (not illustrated) 657098-001
Optical drive connector for use in 35.6-cm (14.0-in) (not illustrated) 632213-001
Computer major components 33