The Tech Writer uses a fiber tip to put down a fine line.l. The tech writer uses fountain pen ink either cartridges or a convertor so you can use your own bottle of ink..When the tip wears out just remove ink cartridges or convertor then unscrew the tip and screw in a new tip.The pen comes with 2 replacement tip plus the tip that is on the pen.The pen includes 2 convertors.

Features:

Fiber Tip

Filling Convertor or Cartridge

Post - Yes - Threads

Dimensions:

Length - 5.202" (132.13 mm)