Hi, this is a radial blower that use a standard PC fan 50x50x10mm, as motor. The measures are optimize for 0,4 Nozzle with 2 perimeters set, layer 0,2 and 20-25% infill. Watch youtube video to assembly and see it at run ;) And in this video you see my first convertion to repair my fan extruder ;) - If you think to buy from Gearbest and want support me, use my affiliate link, thanks https://www.gearbest.com/?lkid... If you want to make a donation, you can use thingiverse tip, thanks https://www.thingiverse.com/Sg... Check me out at: Youtube https://www.youtube.com/SgaboL... Instagram http://www.instagram.com/sgabo... Google+ https://plus.google.com/+Sgabo... Blogger http://www.sgabolab.com/ Pinshape Shop https://pinshape.com/users/130...