Du-All Art & Drafting Supply

Koh-l-Noor Rapidograph technical pens have been used by artists, architects, designers, engineers and hobbyists for over 30 years to produce precise, consistent ink lines for any application. These refillable pens have a white plastic barrel with a refillable ink reservoir (ink not included), and nibs made from stainless steel. The double-seal cap is airtight, preventing the point from drying out. Each pen is identified by a standard point size or by its line width expressed in millimeters. This technical pen can be used on paper, vellum or tracing paper.