Privacy Guaranteed: Your privacy is the utmost importance to us. The default name on the package is " bottles" " Price $11"(any other requirements, please send us a message), and with our discreet packaging you can shop in confidence, the only person who knows what's inside the package is you! To protect your privacy, we will ship the product without our color package. Hope you can understand . Thank you. How the water pump works? The water pump is an external penile rigidity device which uses vacuum technology to improve and maintain erection quality and duration through regular exercise of the penis. The water pump functions by creating a vacuum seal against the pubic area of the user ,enclosing the flaccid penis.When the pump is pushed downwards against the body,the bellows compress and water is ejected from the end of the pump via the open valve.When released the bellows expand and the valve closes,creating a partial vavuum inside the pump.This causes the penis to expand and fill with blood,creating an erection.Re pumping increases the size of the erection. X5/XX20、X7/XX30、X9/XX40 water pump size： X5/XX20 pump ：1.96inch*7.48inch （Suitable for penile erection length less than 15cm） X7/XX30 pump：1.96inch*8.66inch (Suitable for penis erection length greater than 15cm and less than 18cm) X9/XX40 pump：2.56inch*9.84inch (Suitable for penis erection length greater than 18cm and less than 22cm) Xtreme pump full set Product detail presentation