A perfect choice if you’re starting out with penis enhancement, Hydro7 was the first hydropump we created. Building real increases for penis length and girth while improving erectile hardness and lasting power, Hydro7 is a gentle yet effective penis pump option that delivers real results. The most popular version of an innovative pump designed to harness the natural suction created by water in your tub or shower, the Hydro7's penis enhancing power has been endorsed by male sexual health experts, various men's health magazines, and many, many happy customers. The number 7 in the name is a handy reference to the size of penis that this particular pump works best for. If you're up to 7 inches/17.8cm hard, this is the one for you. There are nice clear markings on the side of the box, so if you don't feel like getting out a ruler, just compare your erection to the markings. If you fall between the two orange lines, you're good to go! Take a good look at the Hydro7 before getting started to get familiar with your new pump, and read through the included instructions. The theory behind this great system is simple, once the penis is in place and comfortably surrounded by warm water, you'll push down on the cylinder to expel any excess, naturally creating a suction effect. Gentle yet definitely effective, the following pressure draws blood into the penis and surrounding tissue, creating a firm erection and in essence providing a workout for the male sex organ, keeping it in shape, so to speak, and operating at peak capacity. Even if you're a complete newbie, the Hydro7 pump is by no means intimidating, and use is virtually effortless. Once in the tub or shower, you'll fill the inner cylinder with water and insert the relaxed penis inside. There's a slanted side to the gaiter's sealing ring, this should be placed against the testicle area to avoid unwanted pressure in that area. When the base is evenly placed around the base of the penis, push down on the cylinder to release excess water. You may need to repeat this step a few times, optimal suction occurs when no more water is expelled. At this point, you can lean back and relax, letting the suction do its work. If at any point you experience discomfort or pain, you can immediately eliminate pressure by pushing the quick release valve at the top point of the Hercules. Your Hydro7 consists of an extra sturdy polycarbonate cylinder marked off into clear measurements, a pliable, skin safe synthetic rubber gaiter base and stainless steel spring release valve up top. This pump was tailor made for penises from 5 to 7 inches (12.7-17.8cm) in erect length.