This Monteverde USA refill to fit Montblanc® rollerball pens offers: - Smooth, comfortable writing. - Finest developed inks. - Precision engineered from USA. - High quality metal parts. - Nickel plated brass tube, Swiss tip and tungsten carbide ball. Monteverde USA® refills are not manufactured, licensed or endorsed by the pen manufacture referred to above. The trademarks of the pen manufacture are identified only for the purpose of providing refill compatibility information.