1 2U 2.5" SATA/SAS 8-Bay backplane\n 2 SR650 second& third 8x 2.5" or 12x 3.5" NVME HDD backplane power cable\n 3 SR650 8x 2.5" HDD backplane signal cable\n 4 SR550 8x 2.5" HDD backplane signal cable\n 5 SR550 second 8x 2.5" HDD backplane power cable, SR650 first 8x 3.5", 12x 3.5" or 8x 2.5" HDD backplane power cable\n 6 SR550 first 8x 2.5" HDD backplane power cable\n 7 4x 1 2.5" HDD filler\n 8 1x 1 2.5" HDD fillers (4) Feature Feature Value Rack capacity 2UCompatibility Think System SR550/SR650 Quantity per pack 8 pc (s)