The new Karas Pen Co. Vertex Fountain Pen is interesting for a number of different reasons. It features a snap cap, the pen is made out of delrin ($130 for black or white delrin), it can be eyedropper filled and features a translucent ink window (nine color options to choose from). There are acrylic bodies…
![Fountain Pen Review: Karas Pen Co. Vertex (Delrin)](https://i0.wp.com/www.wellappointeddesk.com/wp-content/uploads/2019/09/fps-12.jpg?resize=760%2C570&ssl=1)