Check the listing for details. Bathmate Hydromax7 Water Penis Pump - HydroMax 7 Hydropump Bundle Kit. Color: Clear, Condition: New. Listed at 169.99 USD. Designed for men with erect penis size between 5'' - 7''. The hydromax7 penis pump uses water rather than air pressure which can assist potential penile engorgement and features 35% more suction power than the Bathmate HYDRO7 model. The included Hydromax insertable comfort pad gives increased comfort and greater support around the base of the penis (removable for easy cleaning). It's made from skin-safe elastomer that helps to provide an extra-tight seal around the base. The addition of a Super Flow Latch Valve system allows for single-hand filling of the vessel in the shower. A measurement gauge (both metric and imperial) gives the user increased accuracy in tracking gains, while the textured vessel at the top and base of the pump gives better control through more grip. Includes: Hydromax7, Bathmate Maxout Sample, 4 rod Penis Extender Proof of Authenticity- You can easily register & verify your product(s) with your unique " Product Identification Code " (PID) code Located on each cylinder.