A traditional manhood pump works by creating pressure believed to enlarge the manhood and also expand it. It is the dream of many to have an expanded manhood despite the fact that the habitual pumps provide temporary gains. However this is still believed to be achievable through persistent use of many weeks or months.
The difficulty found is that most people cannot continue using it for long citing reasons like fear of injury or inconvenience.
There were injury reports from the use of the old model pumps and they made the manhood enlargement have a negative report. The benefits were questioned as well.
Penile pumps are being introduced in the market and they do not use air but water for the creation of pressure resulting in enlargement. Though the size is not permanent it is still apparent from the new hydro pumps.