This Speedball Elegant Writer calligraphy marker features a 2.5mm medium chisel nib with dye-based, acid-free black ink. It is ideal for creating beautiful calligraphy projects like invitations, greeting cards, and journal entries. The marker is made with crisp chisel nibs and contains free-flowing, acid-free ink. The ink is also non-toxic. Speedball's commitment to providing superior products at affordable prices began in 1899.