Pilot Kakuno Fountain Pen - GreenIdeal Fountain Pen for Beginners The Kakuno Fountain Pen from Pilot features a transparent neon green body, a twist off cap, and a flexible steel nib. Writing with a fountain pen allows a greater degree of creative expression, and changing out the ink colors is fun! Fountain Pen Plastic body Capped length: 13. 1 cm 5. 2" Posted length: 15. 9 cm 6. 3" Stainless steel FINE nib Cap posts on the end with a secure click Compatible with Pilot Namiki