Staedtler-Triplus Fineliner Pens. This water-based ink is in an ergonomic triangular shape pen for relaxed and easy writing. These pens can be left uncapped for days without drying up. This 6-3/4x2- 1/2x3/4 inch package contains six pens with 0.3mm tips in assorted colors. Comes in a variety of colors. Each sold separately. Conforms to ASTM D4236. Imported.