The Pilot Prera has a clean and simple look and writes luxuriously. The newest body line is even more unique with its crystal like acrylic bodies and color accents. You can fill the pen with the ink of your choice by using the included converter, and the transparent bodies allow you to see the ink levels remaining in the converter or an ink cartridge. The pen feels very well made, is ergonomically lightweight, and the alloy nib is delightfully thin enough that you can use it for everyday writing. Each pen comes with a CON-50 converter.