fan 25/25 duct for hexagon hotend on i3 rework

This is a fan duct for a 25x25mm fan. You can use it for active cooling on a hexagon full metal hotend with about 18mm diameter.
I tried with 230C ABS printing and ist fine and you have less weight on your Extruder.
Mount the fan with M3 screws or like I did you can glue it with some foam rubber to minimise vibrations.