Take your hydrotherapy to a whole new level with the world'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 HydroXtreme11 is designed for a user whose penis is 9-11 (23-28cm) when erect.