- Lamy Z 50 replacement designed for ballpoint pens and fountain pens - B-type nib made of stainless steel, offers durability and long lifespan - Line width of 0.6 to 0.75 mm, ideal for smooth and precise writing - Silver color finish, adds an elegant touch to your writing instruments - Includes 1 unit, easy to install and compatible with Lamy models with interchangeable nibs - Nib channel with rail ensures a constant and even ink flow - Perfect for professionals, students, and stationery enthusiasts seeking quality and performance - Suitable for daily use in the office, school, or at home