This is a clip on fan for the E3D v6 extruder. It supports a 40mm fan, specifically the Pengda Technology 24vDC fan. One stl has a wider body so it can push a
...Plus little more air volume thru. Nothing fancy, just a fan duct.
Fan Link:
http://www.aliexpress.com/item/2pcs-DC5V-12V-24V-40mm-Computer-CPU-Cooler-Cooling-Fan-PC-4cm-40x40x10mm-2pin/32608241987.html
