This is a custom fan duct made for the E3D V6 carriage in this link:
-Hook that fixes the fan in place so it does not fall if the fan hits a warped piece of plastic (it happened to me on my previously designed fan duct)
-Half circle to be able to remove any plastic or issues while printing
-Bigger holes then my previous design
-Less noisy then the previous design
There is a version without the hook but I highly recommend screwing it in place with the hooked version.
This fan duct will cool down mostly the hotend. If you see that the fan duct is too high on the heat block, you can adjust the height of the fan duct.
Yes, it looks like a scorpion
Link to the E3D V6 clone
Printed without supports, the bridging is not that hard to print on this model.