TWSBI Precision Fountain Pen - Gemini BluePrecision engineering, softened by colour The TWSBI Precision Fountain Pen Gemini Blue takes the industrial confidence of the original Precision series and gives it a quieter emotional edge. The machined metal body still feels exact and deliberate, but the Gemini Blue finish introduces a calm feel. What sets it apart Machined aluminium body for a solid, engineered feel Gemini Blue finish adds depth without becoming flashy Clean hexagonal design