The Kaweco ballpoint pen refill in black brings absolute precision to the paper with a line width of delicate 0.5 mm. It is particularly suitable for precise drawings, small and fine lettering or entries in the bullet journal.

Available in the standardized format of a D1 refill, it can be used in various writing implements. At Kaweco writing instruments, the ballpoint pens of the Liliput series and the Sport series are suitable for this.