This Monteverde USA® refill offers: - For the first time ever, a gel refill to fit Montblanc® pens. - Also fits Sailor® ballpoint pens. - Smooth, comfortable writing. - Finest developed inks. - High quality metal parts. - Stainless steel tip, 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.