44W4899 - IBM - Power Backplane 3.5-inch for x3550 44W4899 - IBM - Power Backplane 3.5-inch for x3550 $54.24 $44.10
39Y6972 - IBM - Power Backplane Board for System x3550 39Y6972 - IBM - Power Backplane Board for System x3550 $30.73 $24.99
49Y4833 - IBM - 6-SAS Hdd Backplane for X3550m2 49Y4833 - IBM - 6-SAS Hdd Backplane for X3550m2 $43.05 $35.00