""D-002" is written on the label. It's hard to imagine how this could be used for anything."
— Inventory description.
The D-Series Arm is an item in Resident Evil 7: Biohazard.
The D-Series Arm is crucial for creating the Serum. The player must give both it and the D-Series Head to Zoe Baker.
The D-Series Arm is attached to a naturally mummified child - specifically a D-Type - hidden in a secret compartment of the Detention Room.