Pilot, Prera, BrownFountain Pen Description: The Brown Pilot Prera is a gorgeous fountain pen that writes beautifully. The Prera is a light pen with clean lines that might just prove to be a workhorse writer in your pen case! As you'd come to expect with Pilot, the nib is exceptionally manufactured and displays true Japanese style. Fountain Pen Specifications: Material: Acrylic. Closed: 120 mm (4. 7 inches). Posted: 134 mm (5. 3 inches). Open: 108 mm (4. 3 inches).