All of our fountain pens can be converted into rollerball pens with a few hardware changes, make your choice at checkout. Our fountain pens use high quality German made flexible steel nibs which are available in extra fine, fine, medium and bold. Calligraphy nibs are also available. Every nib is carefully examined and fine tuned at the time of assembly. Our rollerballs use Schmidt refills with super smooth cermamic balls for an outstanding writing experience. We leave it to you to select the type of nib that you want, but for new fountain pen users, we recommend medium nibs. Rollerballs are available in fine or medium points, blue or black ink, make your selection at checkout.