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The Black Jack Penis Pump can be used to achieve a harder, stronger, longer lasting erection or as a masturbator. This sleek, easy-grip vacuum penis pump has a 7 inch clear silicone chamber with dozens of pleasure nodules for extra stimulation. A battery pack powers the stroking, vibrations, and suction power. Achieving a rock hard erection is easy, simply pump the quick release suction bulb a few times and your penis will become erect. This unique pump has a multi-speed controller so you can regulate both vertical stroking and intense vibration. Four C batteries required.

To get the most benefit from any penis pump, SInclair Institute recommends that you use the penis pump to achieve a firm erection and then use a cock ring or cock strap to maintain erection during sexual activities.