CR-10 light yet effective hot end fan ducts
thingiverse
These lightweight hot end fan ducts produce negligible mass forces, making them effortless to install. Simply utilize the screws from the original head cover or vents, replacing the 40mm vent with a silent one if desired. The result is outstanding performance and an unobstructed view of the nozzle during printing, surpassing the original extruder head in every way.
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