Uni Pin Fine Liner Nib Sizes: 0.03mm ultra-fine tip is ideal for very small detailing, delicate lines and soft free shading. 0.05mm tip is ideal for delicate fine detail and free shading. The PIN's wide choice of nib sizes allows you to create crisp, clear lines and perfect techniques such as stippling, cross-hatching and shading. 0.1mm tip is perfect for strong but thin lines, layering and hatching. The PIN’s wide choice of nib sizes allows you to create crisp, clear lines and perfect techniques such as stippling, cross-hatching and shading. Perfect for technical drawing, plans and layouts, sketching, graphics, cartooning and other design works. 0.2mm tip is perfect for crosshatching and fine outlines and details. 0.3mm tip is perfect for crisp, clean, precise lines whether writing, drawing or sketching 0.4mm tip is perfect for detailed drawings and craftwork. 0.5mm tip is robust making it perfect for outlines and clean graphic sketches. 0.6mm tip produces fine lines perfect for cards, drawing, crafts, doodles, and other designs 0.7mm tip products a consistent line that is perfect for technical applications such as drafting, illustrating, and graphic design 0.8mm thick nib is excellent for broad strokes and lines as well as colour coverage. The brush tip adapts to any pressure, angle or speed of writing, giving you the power to truly master brush script and expressive brush pen painting techniques.