Internal Apple 1KW power supply for a late 2005 quad core 2.5GHz PowerMac G5 only. To confirm the correct unit, check that the penultimate three characters of the serial number on the old power supply are one of the following: S9G, S9H, UGV, UWW or VJ4.
This is an exchange part and therefore a faulty power supply of the same model must be provided before the part will be shipped.