HydroXtreme8 The pinnacle choice for penis pumping, our latest edition to the series for even better choice over sizing. The most advanced choice of penis pump on the market for those measuring between 6 and 8 inches, HydroXtreme8 lets you maximize your gains, with an easy-to-use handball letting you achieve the maximum level of safe pressure. If youre an experienced user, HydroXtreme8 lets you get the very best from your penis pump workout, while new users can customize their routine, starting out gently to build up lasting gains.