The Winsor & Newton Designers Promarker Brush is the perfect tool for any artist looking to add a unique touch to their work. This marker is made with a brush tip that allows for precise and accurate lines, making it ideal for detailed illustrations and artwork. The marker is filled with a cool grey 4 ink that is fade-resistant and waterproof, ensuring that your artwork will last for years to come. The marker is also double-ended, with a brush tip on one end and a fine tip on the other, giving you the flexibility to create a variety of effects. The marker is easy to use and requires no special instructions or techniques. Simply draw or write as you would with any other marker. The Winsor & Newton Designers Promarker Brush is a great choice for any artist looking to add a unique touch to their work. With its fade-resistant and waterproof ink, it is sure to last for years to come.