Lenovo ThinkPad T420 CPU Cooling Heatsink & Fan UDQFVZR01FFD 04W0409 04W0407
P/N: 04W0409, 04W0407, 04W0627, 0A66706, UDQFVZR01FFD, 0B46252, M-231C-21. Lenovo ThinkPad T420 CPU Cooling Heatsink & Fan Assembly. It is not compatible with the T420s or other laptop models. Helpful Links.