This design looks like a far more advanced and refined approach of the Alphacool Cape, the link for which:
http://www.alphacool.de/perl/shop.pl...1&art_id=12118
The Alpha too seems to have the successive "steps" forming a pseudo-hemisphere (or in the Alpha's case, a Christmas tree). But no CNC'ed top, and way too tall. Nowhere near as nice as this one.