HPE 837074-B21 refurbished power supply is a server PSU intended for use in supported HPE configurations. The distributor identifies it as a 500 W low-halogen FIO non-hot-plug unit and gives 866726-001 as its spare part number.
It is specified as a 1U, 12 V supply with no auxiliary output. For the ML350 Gen10, the listing limits its use to tower mode and states that supplies in one server must share the same spare part number. The listing describes this item as refurbished and tested.