The Netgear ReadyNAS FSP120-40LE Netgear ReadyNAS Ultra 4 is an odd size power supply and it is very hard to find since it uses a power supply that has different wiring and electrical flow. Our redesign 350W SINGLE CABLE Power Supply is a replacement to work with your Netgear ReadyNAS FSP120-40LE Netgear ReadyNAS Ultra 4 server. No re-modification is required! Larger wattage gives you more stable system, cleaner power, and more upgrade possibility. This is a brand new power supply. We do not sell used, refurbished or pulled power supplies.