Ender 3 40mm fan duct for parts cooling
thingiverse
The duct is for the Ender 3 (and similar) and mounts to the side of the stock extruder housing. There are already some similar designs on Thingiverse, but I moved the fan up a bit, making it possible for the duct to have a cutout on the back so that it won't hit the bolts for the x-axis belt tensioner when nearing its max position.
Download Model from thingiverse
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