Monteverde USA S.T. Dupont Rollerball refills offer: Smooth, comfortable writing Finest developed inks Precision engineered from USA High quality metal parts Nickel plated brass tub and Swiss tip We offer a variety of ink colors to add new technology, fun, and function to your writing style. Use different colors for holiday cards, letters & personal notes. M onteverde 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.