2 x 70mm Wemotec minifan 480 Electric Ducted Fan Units Brand New in Pack
These are really high end units.
The latest version is here: http://www.espritmodel.com/index.asp?PageAction=VIEWPROD&ProdID=2238 (This is the Pro). Dimensionally they are the same.
Both for 4500
how much it costs.,i am intrested