The Staedtler® Triplus Triangular Colouring Pens is a fibre tip-pen with a sturdy pressure resistance tip and dry safe water based ink.Ergonomic triangular shape.Can be left uncapped for days without drying up.Complete with a ventilated cap.Water-based ink washes easily out of most textiles.Stable pressure-resistant tip.Line width approx. 1.0mm.