Moshi Zefyr Macbook 13 Inch and Air Aluminum Cooling Pad (Black) Macbook 13 100% cast aluminum heat sink assembly Collapsible design for enhanced portability Embedded USB-powered ultra-silent fan (&lt;20db) Cooling Pad Will Fit Older Macbook 13-Inch Macbook & 13-Inch Aluminum Unibody/13-Inch Pro