Pump start your length and girth with this easy-to-use device that increases penis blood flow. With a soft silicone ring upon entry, gentle suction begins inside the durable ABS plastic tube at the press of a button. A quick-release valve stops suction immediately when you've finished exercising. Measurements on the outside of the pump tube show your progress and clean-up is a snap with parts that easily dismantle. Pump start your way to deeper satisfaction! Five Year Warranty.