Yes, but interestingly, you cant actually see it from the photos but the underside has been especially formed using wind tunnel techniques, so that, although it still has a really square un-aerodynamic shape, its got a much reduced drag co-efficient (almost unbelievably so in fact) so that it goes much faster than identically shaped non Works sponges over your rear screen.
Where have I heard THAT before...
Sorry, no photos of the underside as its a secret.