The Winsor & Newton Sable Series 7 Brush No.1 is a high-quality brush designed for professional artists. It is made from the finest quality sable hair, which is soft and resilient, allowing for precise control and a smooth finish. The brush has a long handle for comfortable grip and a nickel-plated brass ferrule for durability. It is suitable for use with a variety of mediums, including watercolour, acrylic, and oil paints. The brush is ideal for creating fine details, such as thin lines and delicate brushstrokes. It is also suitable for blending and creating soft edges. The brush is easy to clean and maintain, and can be used with a variety of techniques. It is an essential tool for any artist looking to create professional-looking artwork.