This if for an ebay e3d v6 clone that has a dia of 25mm
I brought a Kossel Mini (micromake) but didnt like the effector that was included.
I used this one for the hot end auto leveling
http://www.thingiverse.com/thing:820768

I like it but there was no where to add a part blower fan for printing pla.
I found this fan
http://www.thingiverse.com/thing:692384
and combined it with
http://www.thingiverse.com/thing:601273

So now i have a part cooler fan and a hot end cooler.
Works great. I Do think that my 30mm fan is to strong. When it kicks on the hot end temp drops for a little bit