MacBook Air Dock with heatsink

Heatsinks are 200x70x36mm aluminium. 

Helps dissipate heat from the aluminium frame of macbook airs and delay thermal throttling during heavy loads. 

Could be even more effective if you've done the thermal pads mod but I haven't done this. 

The heatsinks I received had a really nice finish but make sure to check yours & sand as appropriate to prevent scratching your macbook.