With a total cylinder length of 20 cm and a diameter of 6 cm, this high-quality pump, rechargeable via USB, offers numerous possibilities for growth in two directions. The insertion sleeve is made of smooth and flexible silicone for easy insertion. You will be surprised every time at how large you can become. At the push of a button, this extremely powerful rechargeable pump creates a super-strong vacuum, allowing you to achieve a quick and powerful erection. The soft silicone opening seals comfortably. Warning: Please read the product manual before using any type of vacuum pump or constriction ring. Discontinue use immediately if you experience pain or discomfort.