The Uni-Ball Pin Fine Liner Drawing Pen features fade-resistant and waterproof ink, making it ideal for artists. It has a premium-quality, steel-protected nib designed for comfort and durability, and is versatile enough to be used with watercolours. The pen's highly economical design includes waterproof and fadeproof pigment ink, suitable for all art and design applications, including sketching and technical drawing. The steel-supported polyacetal nib is available in various line widths. Its metal surround protects the nib, making it suitable for use with stencils. This pen contains black ink, part of Uni's Super Ink range, known for being fade-resistant, water-resistant, and tamper-proof.