Filament Cooler for Geeetech i3 Pro B by Dr.One

As cooled filament while printing look much much better I decided to create my own variation so because often changing nozzle (different lengths) my cooler is extendable, nozzle can be lowered or rised depending on nozzle height just sliding up or down.
This is first (testing) version so please understand some imperfections :).

(printed short version - very fast print speed (150mm))
fill 50%
filament 80