Extruder Tube Cooler for K8200 printer

This thing is a nozzle for a small radial blower.

Attach to your K8200 in order to keep the extruder tube cool during long prints.

An axial fan could also work here but a 40mm fan is too large and smaller ones are difficult to get. In my opinion the radial fan also fits better behind the extruder and is easy to mount with a few cable ties.