The Power Piston is the total power tool. A combination pump and vibrating stimulator, this versatile pink friend will keep you happy and humming. Just slip your penis into the opening and use it as a masturbater, sliding on and off. Work the hand pump to create a powerful suction. Twist the pressure valve to release the vacuum. Crank up the vibrator and feel the powerful and pleasureable sensations this pump delivers. Use the vibrator with or without the suction pump; its your choice. Depth of penetration: 20 cm.