Combines Comfort & Convenience of Rollerball Pen with Fine-writing Stroke of Fountain Pen. No More Messy Cartridges or Blotting Paper: V-pen is Disposable, with Ink Already Loaded Straight into Barrel, Complete with Viewer Window So You Can See How Much Ink You Have Left. Ideal as First Pen for Those Learning to Write with Ink Because If You Make Mistake, Ink Erases Using Standard Ink Eradicators. Minimum Quantity: 100.