Comes complete with 2 fully functional cylinders, 7 X 2 (inside diameter). The vacuum is created simultaneously by a single ultra powerful piston grip pump. It features easy to use trigger vacuum release for comfort and safety. The specially designed valve releases 2nd cylinder and closes the main vacuum to primary cylinder. The packaging also includes two latex grippers, a silicone cockring to maintain the erection created and a free waterbased lubricant pillow (10cc). Enjoy the mighty erections now!