Mounted to the exit of 50mm fan. Blower mounted with one 3mm screw. I wanted this to be as light as it's possible.
Fins in the end are turned by 10 degrees, so air create downward vortex around the tip of the nozzle. It is visible with hot filament dripping from the nozzle with cooler on, it's spinning clockwise.
This printer is Anet made from 6mm plexi.