TWSBI Classic Sapphire Fountain Pen is made of shiny poly- carbonate and the details are chrome-plated.
TWSBI Classic fountain pen has a round barrel and the cap with four flat sides. The pen uses a piston filling system which takes 1.5ml of ink. The barrel and cap body is made of Resin and Aluminum. The nib is stainless steel.
TWSBI Classic Sapphire Fountain Pen is designed to be completely self-serviceable. This Fountain pen comes with a wrench and a vial of silicone grease you can use for maintenance.