This drive isMG09ACA18TEY which is an Apple OEM version ofMG09ACA18TE. It is an enterprise HDD. Please make sure your power supply is SATA 3.3 spec compliant. If your SATA power cable has 5 wires instead of 4 wires, your power supply is too old for this drive.
It was a new drive and sold to a buyer. Later, buyer returned it because it developed reallocated sectors. We don't know what really happened to the drive by the buyer. But that's very weird. After we received it back, we ran stress test on the drive and confirmed that it was not developing new reallocated sectors. It works perfectly fine. It has less than 500 power-on hours.
If for whatever reason you are not satisfied with this item, you can return it within 30 days of purchase.