The Fishbone RDA is definitely one for the books. This sleek see through RDA has large bottom airflow holes for the best flavor and an amazing amount of vapor. It has a Kennedy v2 style base with a glass shell and has deep juices wells. It comes with an additional glass shell for those who can be rather clumsy. The Fishbone has an adjustable copper pen center post and 4 bottom airflow holes. There is nothing fishy about this RDA and there is no doubt that it is one of the best RDA's on the market right now!