The perfect fit design creates an air-tight vacuum for better suction. The cylinder is 6¾" X 2". The E-Z squeeze bulb gets you harder, faster for dramatic results! Mr. Big has a one-touch vacuum release button so you can get in and out in a hurry. For your viewing pleasure, the chamber is transparent. The soft, vaginal PassionSkin pump seal feels great and makes your pump even more effective. For your convenience, Penthouse lubricant is included for you. Mr. Big is a fabulous travel size for men on the move!