Staedtler Triplus Fineliner pens are an ideal choice for coloring zentangle designs, small details and intricate illustrations. These pens are filled with richly pigmented water-based ink, with a nib width of approximately 0.3mm for precise lines. The ergonomic, triangular barrel allows for relaxed use. Ink washes out of most fabrics and is dry safe—pens can be left uncapped for days without drying out. Triplus Fineliner sets come in Staedtler’s famous pen box, which doubles as a pen stand.