The Hydromax Series (Hydromax X-series) is the next stage of Hydro Pump evolution. Developing the innovative Bathmate, the new bellows pump and valve give 35% more power than the original hydro pump with more safety and comfort. Benefits: Helps to increase your penis length and girth | Instantly visible results | Harder and stronger erections | Helps you last longer in bed | High quality materials and patented technology | Completely safe to use. Bathmate Hydromax7: Designed for people measuring between 5 and 7 inches, the Hydromax7 is a high-power penis pump creating lasting gains.