1 2U 2.5″ SATA/SAS 8-Bay backplane 2 SR650 second& third 8×2.5″ or 12×3.5″ NVME HDD backplane power cable 3 SR650 8×2.5″ HDD backplane signal cable 4 SR550 8×2.5″ HDD backplane signal cable 5 SR550 second 8×2.5″ HDD backplane power cable, SR650 first 8×3.5″, 12×3.5″ or 8×2.5″ HDD backplane power cable 6 SR550 first 8×2.5″ HDD backplane power cable 7 4×1 2.5″ HDD filler 8 1×1 2.5″ HDD fillers (4)