Namiki - Pilot Prera Black Fountain Pen Medium Nib 
The  Prera fountain pen has a clean and simple look, is tastefully colorful,  and writes luxuriously. This new body line is even more unique, formed  from crystal-like acrylic with color accents and  elegantly decorated  with metal trim. You can fill the pen with the ink of your choice by  using the included converter and is also equipped with a vacuum seal cap  and a unique capillary controlled ink delivery system. Prera fountain  pen nibs are protected from drying out and will not blot on writing  surfaces. The transparent body allows you to see the ink level remaining  in the converter or an ink cartridge. Perfect as your every day user  with its ergonomically light weight and, of course, the alloy nib available in medium and fine which is delightfully thin.