Fine Pens – Charles Hubert Discount Rollerball Pens Marbalized Blue Finish Accents The silver finishings, medium size nib and heavy-duty clip add a timeless touch to these fine pens. Charles Hubert fine writing instruments feature a lifetime warranty against mechanical defects. This discount fountain pen can be refilled using standard ball point cartridges and utilizes a medium sized silver tone nib. Our charles hubert fountain pens are the fine writing instruments available.