Hydromax X40 Crystal Clear. If he’s feeling voyeuristic, the Hydromax X40 hydrotherapy penis pump in Crystal Clear is the perfect pick. This pump is designed for larger men who want even more girth and length added to their size. The Hydromax X40 gives visible results with regular use just 15 minutes a day is enough to increase size as well as improve the health of his penis. By increasing blood flow to the vessels, this product ensures stronger erections that last longer. The comfort ring and soft seal combine to ensure maximum comfort. The swivel action allows him to twist the X40 penis enlargement pump for maximum flexibility. This penis pump is made from skin safe medical grade materials and the textured vacuum tube ensures that he has a better grip. The X40 uses water for an even pressure, and can be used in the bath or the shower daily.