About this 3D model

This is a fanduct for a MakerGear M2 Z-Axis stepper motor. The stepper was getting very hot and just putting a cooling fan close to the stepper improved the situation but the temperature was still pretty high. This duct forces the air to flow around the stepper and keeps the temperature much lower. I got the fan from www.pollin.de, here is the direct link: http://www.pollin.de/shop/dt/MzY2OTc2OTk-/Bauelemente_Bauteile/Luefter/Radialluefter_DELTA_BFB0512HH.html