BIC Velleda 1721 whiteboard pens are shaped like a marker, so they're just what you need for detailed work at home or at school. These BIC Velleda whiteboard pens are designed with a fixed bullet nib that doesn't retract under the pressure of writing. Available in 8 vivid colours to make your words stand out and highlight important ideas. The sky's the limit since they have good erasability immediately and even after a few days.