Incredible sucking action from a sturdy vacuum cylinder with easy to use pressure bulb, quick release valve and a latex ring. Cylinder measures 8 inches in length and 2.5 inches wide. Some men swear by the use of pumps as effective tools for increasing size, while others think pumps have no lasting effect. Pumps can extend length while using, but the question is, will the penis return to original size after using? Unfortunately, we do not have that answer and can not guarantee or be responsible for any results.