Handle Infinium meets all requirements of the class. Like all handles Fisher Infinium is high quality. The rod in the handle can not be replaced but the ink chamber you enough for example to maintain a continuous line for more than 50 kilometers. With this pen you can enjoy life when guided by the fact that the average life expectancy - 80 years. Unique carbide ball promotes uniform flow of ink. This pen will write at any angle and in any environment: in weightlessness under water on wet paper glass with extremely low or high temperatures.