73GB 15K Rpm 80-pin SCA SCSI HOT SWAP-capable Hard Drive Kit. Includes Caddy for POWEREDGE 1500sc, 2300, 2400, 2450, 2500, 2500sc, 2550, 4300, 4350, 4400, 4600, 6300, 6350, 6400, 6450, 7150, 8450, Powerapp 200, Powervault 735n, 750n, 755n. Hot Swapping supported with appropriate Raid Controller.