The Pelikan Souveran M400 is a medium-small sized and relatively lightweight, luxury fountain pen which features an 14 carat gold nib with rhodium decoration giving a two-tone finish. 

The striped barrel body of the M400 is made from celluloid acetate which is a cotton derivative and so each one is slightly different to each other, much like wood has different knots and patterns. The barrel is translucent, so you can see how much ink is left inside the pen by holding it upto a light.

The black parts of the pen are made from high quality resin, which has a sheen and is strong and lightweight.  The metal trim of the pen is 24 carat gold plated.