Tombow Dual Brush Pens have two tips; a flexible brush tip and a fine-point, hard nylon tip. Both tips are fed from the same ink reservoir ensuring exact colour match. Tombow Dual Brush Pens are odourless water based inks that blend to create any colour desired. With the flexible nylon fibre brush tip, you can achieve fine, medium, or bold brush strokes simply by changing the pressure on the point. The resilient tip springs back to hold its shape, stroke after stroke. With the hard nylon tip, you can create consistent lines, tight drawings, borders, copy markings, fine lettering and colouring in. Tombow Dual Brush Pens tips can be dipped in water to create subtle colour washes. They're ideal for use with rubber stamps. Tombow Dual Brush Pens are 20cm in length with colour-coded caps for quick selection. The brush nib and hard nib are at opposite ends, and the barrel's anti-roll design is perfect for busy artists. The pens are odourless, use non-toxic inks or pigments, and are acid-free.