This pack of 4 Triplus permanent markers from Staedtler are ideal for marking on almost any surface. The ergonomic, triangular design of each pen ensures effortless, and fatigue-free writing.Each pen has a large cap with a hole through enabling you to take the pen out and about with you while linked to a carabiner or keyring. Ideal for customising, marking CD/DVD\'s and a must hve for moving home. . Slim Barrel. Pack of 4. Triangular marker. Ideal for marking on almost all surfaces. Bullet tip. Line width 1-2 mm