Water-based ink with a super-fine, metal-coated tip. Ergonomic, triangular barrel and dry-safe feature. Washable from most fabrics. Line width: approximately 0.3 mm. Packaging unit: 10 pieces. Triangular shape for easy and fatigue-free writing. The pen fits perfectly in the hand and prevents twisting. Dry-safe: The pens can be left uncapped for days without drying out. Even after longer writing breaks without the cap, they are immediately ready for use again.