Bathmate - Hydro 7 - Penis Pump - Clear Bathmate penis pumps are all about convenience, safe use and real results. Using a Bathmate hydro pump is simple - fill the Hydro pump with warm water and seal it against the body for three 5 minute sessions to start your journey to fantastic results. Hydro 7 is world's first hydro pump and is best suited for users who measure between 13 - 18 cm in length when erect, making it an ideal choice for most beginners. Using a unique design, the Hydro 7 delivers a better, safer performance than traditional penis pumps, creating real effect for users, with a full 78% of surveyed users experiencing measurable changes in their penis size, strength and sex life. Hydro 7 uses water to create a vacuum. Fits sizes 13 - 18 cm Proven, long-lasting improvements Better erections and sexual stamina Max. vacuum water: 0,40 bar