Upgrades from the Hercules are 35% more power, due to a new state of the art material for the bellows. The Bellows now swivel to give complete 360 degree view of the penis while in use. The internal width is greater and bellows convolutes are larger to house more girth.
Other improvements include:
A long insert comfort pad gives increased comfort and greater support around the base of the penis (removable for easy cleaning). The addition of a Super Flow Latch Valve system allows for single hand filling of the vessel in the shower. The textured vessel at the top and base of the pump gives better control through more grip.
The X20 was the second addition to the Hydromax X-Series as demand rapidly increased for a pump to accommodate men with penises up to 5 inches.