923-0105 A1278 Heatsink for Macbook Pro NB-5916W
This is an Apple heatsink for the 13" MacBook ProUnibody. This helps reduce the amount of heat on the logic board near the main chips.
Apple part number: 923-0105
Compatible models: MacBook Pro (13-inch Mid 2012), A1278
923-0105 A1278 Heatsink for Macbook Pro