Fineliner with superfine, metal-clad tip Ergonomic triangular barrel for effortless, fatigue-free writing DRY SAFE - can be left uncapped for days without drying up (test ISO 554) Airplane-safe - An automatic pressure equalisation prevents pen leakage while on board aircraft Washes out of most textiles Water-based ink With clip PP barrel guarantees long service life Line width approx. 0.3 mm 20 brilliant colours available individually or in sets of 4, 10 or 20 colours as well as in our handy triplus mobile office