Name of This Pen?

[Ucwepn]

Yes well my other hobby at the present is of course collecting transformers and of course the odd custom, I have only one gundam marker at the moment and it's a GM01 200 (black pen type), I ordered some more yesterday though a GM02 200 (grey pen type) and a gundam marker eraser pen. These pens are used for painting in the panel lines to show the hidden detail in colored platic toys and models. There are also GM301 etc which are more like a pin wash paint than a marker where it flows through the line instead of drawing in it by hand.

Here is my Hasbro Brainstorm figure that I have panel lined using GM01