With a total cylinder length of 13.4 in. and an inner diameter of 3.15 in.. this high-quality augment pump gives you ample possibilities. The insertion sleeve is made of smooth and flexible silicone for easy insertion. Equipped with a transparent extra-long vacuum the pump allows you to see your penis grow to an unexpected length and width. The hand held pump has a quick release valve for your comfort. The more you squeeze. the tighter the sleeve around your penis becomes.