For both thick and fine writing.
Once dry, it will not run into water, and it has excellent water resistance based pigment ink for a long lasting vibrancy of fluorescent colors.
The writing line will not discolor even when used on thermal paper, and it will not hide letters even on pressure-sensitive paper.
Line thickness: Thin: 0.03 - 0.04 inches (0.8 - 1.1 mm), Thickness: 0.2 inches (4.0 mm)
Eco Mark certified product, Green Purchasing Act Compliant, GPN Eco Product, uses recycled materials
Sold as a set of 10 solid colors.