15% larger than the X30 Xtreme. The Hydromax Xtreme X40 takes your hydrotherapy workout to a new level. It is our most powerful pump. It has the same unique globally patented design, but comes with many additions, such as a Handball pump that works in water for more Xtreme pumping perception and maximum earnings with the benefit of absolute comfort and control. If you're serious about P.E. the new Hydromax Xtreme X40 is the pump for you. X40 / X40 Xtreme - Less than 9 inches long and less than 2 3/8 inches wide