It is larger than the Hydromax X30, but smaller than the Bathmate Goliath.
It differs from the standard Bathmate Hercules model in the following ways:
Hydromax X40 is larger.
Dual position swivel gaiter for maximum comfort
Ultra-soft insert comfort pad provides solid seal to the body
New patented Hydromax gaiter producing 35% more power
Superflow lock valve for easier use in the shower
The Hydromax is the most powerful water based pump on the market.
Max penis girth 56mm
Max penis length 225mm
Max vacuum air -25bar
Max vacuum water -0.55bar