12V Western Digital WA-18G12K PSU part power supply replacement adapter

12V 1.5A (perfect for 1.5A or below as amperage isn't forced)
AC-DC Switching Adaptor
5.5mm x 2.1mm / 2.5mm Connector (inner spring rests at 2.1mm and opens to 2.5mm)

Part Number: WA-18G12K