This superior pump designed to make whole process go faster with solid comfortable experience. As its predecessor, the Hydromax X20 specifically made for bodies whose penis size is 3- 5" when erect. So if your size match it is very important not to try other pumps but start from that pump or Hydromax X20 because this way you would get the best suction and your gains would go much faster. After some months using that Bathmate X20 you would decide if you need something bigger. If youre serious about P.E. the new Xtreme X20 is the pump for you.X20 / X20 Xtreme - Less than 5 inches long and Less than 1.9 inches wideX20 / X20 Xtreme - Less than 5 inches long and Less than 1.9 inches wide