Staedtler Triplus Fineliner Black 0.3mm - Pack of Six Fineliner with superfine, metal-clad tip Ergonomic triangular barrel for effortless, fatigue-free writing Dry Safe ink means the pen can be left uncapped for days without the ink drying up (ISO test 554) Water-based ink washes out of most textiles easily Line width approx. 0.3mm