Take your hydrotherapy to a whole new level with the worldandrsquo;s most powerful penis pump. Advancing Hydropump design to a new level, with a new valve and detachable handball, the Hydroxtreme-Series is the Hydropump for the man who is serious about getting the very best from his pump. The Hydroxtreme-Series comes complete with all the accessories you could ask for. The Hydroxtreme8 is designed for a user whose penis is 6-8 (15-20cm) when erect.