The hydromax xtreme 7 is a very luxurious penis pump. this pump is used with and under water. fill the penis pump will water. place the hydromax around your penis, pressing it against the abdomen and hips, and start pumping. everytime you pump, a certain amount of water is pushed out the valve. this gradually creates a pleasant vacuum sensation. with the xtreme 7, you will discover the power of penis enlargement.the attached pumping ball is the most important difference between the xtreme 7 and other penis pumps by hydromax. you no longer have to pump as soon as the pump is filled with water and has been placed around your penis. you squeeze the hand pump and notice that the pressure quickly increases. the xtreme 7 is suitable for advanced users of penis pumps and for people with penis lengths between 13 and 18 cm.among others, the box with the hydromax xtreme 7 contains a handy carrier bag, penis meter, cleaning set and attachment for use in the shower.