We are talking with the manufacturer about producing wider cylinders because now after breaking this down, we are now finding the inside dimensions max out at a 2.1" diameter which is a great starting size for those new to pumping but the veterans that are looking for girth growth will need a wider pump. I can see this being a good size for the girthier guys that want to gain length.
If your erect girth circumference is 6" or Under, this will be a great pump for girth and length expansion.
If your erect girth circumference is over 6" and up to 6-3/4" erect, this pump will be ideal for length gains.