HP D9387-63013 - I/O panel assembly - Mounts to the back of the chassis - Has cutouts for I/O connectors Retail
HP A4856-69101 - PCI card cage assembly - Includes 12-slot I/O chassis, I/O board, I/O power board, and I/O backplane Retail
HP A6961-04055 - I/O section hot-swap fan assembly - Includes two fans mounted in a metal frame Retail
HP A4856AX - PCI card cage assembly 3.3/5.0V - Includes 12-slot I/O chassis, I/O board, I/O power board, and I/O backplane Retail
HP D8520-63013 - Hot-swap fan assembly - Includes three fans - Mounts in the fan Tray in the center of the chassis assembly Retail