By fusing the traditional mechanisms of the fountain pen with a modern industrial design, TWSBI created an eye-catching fountain pen that is simultaneously appreciative of the past and relevant in the present. The Precision Fountain Pen comes with a piston filling mechanism and has all detachable parts. TWSBI felt that it was important to allow the user to disassemble and reassemble the pen and completely experience the traditional aspects of owning and using a fountain pen.