The Rotring Tikky Graphic is a fine fiber tip pen with non-fading water resistant pigment ink and a metal encased nib for accurate drawing on straightedges or templates. Rotring"s Free-ink technology ensures consistent high quality lines to the very last drop. The ink-level window shows the amount of ink left in the reservoir at any time. Available in multiple point sizes.Pen dimensions: Approximately 5.5 inches (14 cm) long and 0.42 inches (10.8 mm) in diameter.