The Diplomat Aero Funky Petrol Rollerball Pen, Special Edition 2025, fascinates with its innovative PVD niobium surface treatment, which offers a dynamic play of colors of violet, blue and green depending on the incidence of light. The smooth surface ensures a pleasant feel and a flowing writing experience. Typical Diplomat quality and a smooth ink flow guarantee a comfortable writing experience. As a limited collector's item, this rollerball pen is an expression of individuality and a coveted object for lovers of exceptional writing instruments.