HP 12210-60002 - 20-slot backplane - Interconnect between processor & I/O boards - 20-Slot Backplane - Interconnect Between Processor & I/O Bds Retail
HP 02430-60015 - 16-Slot backplane - Interconnect between processor and I/O boards - 16-Slot Backplane - Interconnect Between Processor & I/O Bds Retail
HP 02430-60004 - 16-Slot backplane - Interconnect between processor & I/O boards - 16-Slot Backplane - Interconnect Between Processor & I/O Bds Retail
HP A5191-69102 - PCI I/O backplane board - Has 12 PCI slots - L1000/L2000 PCI I/O backplane board - Has 12 PCI slots - in the chassis 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