You've got an ST50 V2 and you need both the optical drive bay and drive bay 3 live, but the cages just aren't there. This kit gives you everything in one box: the ODD cage, the drive bay 3 cage, the power cable, the 520 mm SATA cable, and the EMI shielding kit. No piecing together three separate part numbers at 7 am before a site visit. Heads up — this is mutually exclusive with part 4XF7A78619 and 4XF7A79662 (the bay 3-only upgrade). The drive itself is ordered separately under 4XA7A77462. Add to cart when you've got the drive ready to slot in