44W4899 - IBM Power Backplane 3.5-inch for x3550 44W4899 - IBM Power Backplane 3.5-inch for x3550 $98.05
46C7919 - IBM SAS / SATA Hot-Pluggable Backplane 3.5-inch for System x3350 (type 4192) 46C7919 - IBM SAS / SATA Hot-Pluggable Backplane 3.5-inch for System x3350 (type 4192) $89.52
94Y7587 - IBM 2.5-inch SFF Hard Drive Backplane for System x3550 M4 94Y7587 - IBM 2.5-inch SFF Hard Drive Backplane for System x3550 M4 $118.28
39Y9541 - IBM SAS/SATA Hot-Pluggable Hard Drive Backplane 2.5-inch for System x3550 x3250 (model 4Sx) 39Y9541 - IBM SAS/SATA Hot-Pluggable Hard Drive Backplane 2.5-inch for System x3550 x3250 (model 4Sx) $40.00
90Y4336 - IBM Quad Port 2.5-inch Hard Drive Backplane Board for System x3550 M4 90Y4336 - IBM Quad Port 2.5-inch Hard Drive Backplane Board for System x3550 M4 $130.12