mesh density no respect the box limit
 

Hi every body
I have a question about the setting of density box.
I created a complex boxes of density around a inside cavity of nose, see pictures.
I want to know if it is possible to set the density box to force the refinement only inside the box, see pictures. I don't want refinement on the nose but icem do it !
My setting is just the size, the rest is zero (width ...)
Thank you :D