The Winsor & Newton Designers Promarker - Putty is an essential tool for any artist or designer. This marker is made with a high quality, alcohol-based ink that is both lightfast and permanent. The ink is also water-resistant, making it ideal for use on a variety of surfaces. The marker has a chisel tip that allows for both fine and broad strokes, making it perfect for creating detailed illustrations or bold designs. The marker is also double-ended, with a fine tip on one end and a brush tip on the other, giving you even more versatility. The ink is non-toxic and acid-free, making it safe for use on a variety of surfaces. The marker is also refillable, so you can keep using it for years to come. With its high quality ink and versatile design, the Winsor & Newton Designers Promarker - Putty is an ideal choice for any artist or designer.