http://www.performance-pcs.com/catal...oducts_id=3610 $10 sleeved there, haven't seen them anywhere else

It was my favorite quiet fan that I've tested for sure....IMO, one of the best things about it was that it was already at ambient noise levels as high as 7V....only fan I had that did that that was also 'good.' Great for 12/7/0V switch-type fan controllers.