Fan mount for BIQU H2 extruder if you've put a volcano-type heater block on it. Recommend print out of higher temp filament in order to handle bend and heater block temps (PLA will probably warp the mount)
I was able to print it with no supports in the actual "tube" if you angle it just right.
H2-Volcano_PartCoolingFanBIQUH2.STL | 5.1MB |