The Winsor & Newton Designers Promarker Brush - Cool Grey 1 is an essential tool for any artist or illustrator. This marker is made with a brush tip that is perfect for creating fine lines and details, as well as broad strokes. The marker is filled with a lightfast, alcohol-based ink that is permanent and non-toxic. The ink is also water-resistant and smudge-proof, making it ideal for use on a variety of surfaces. The marker is double-ended, with a brush tip on one end and a fine tip on the other, allowing for a range of creative possibilities. The marker is also refillable, so you can keep using it for years to come. The Designers Promarker Brush is perfect for creating illustrations, comics, and other artwork. It is also great for adding details to existing artwork, such as shading and highlighting. With its lightfast ink and versatile brush tip, the Winsor & Newton Designers Promarker Brush - Cool Grey 1 is an essential tool for any artist or illustrator.