The DSI Exclusive Acrylic Building Brush No. 8 is made of natural Kolinsky bristles, providing uncompromising precision and quality for professional nail artists. The 17 cm long brush with 20 mm long fibers allows for maximum control and smooth flow of the acrylic onto the nail, ensuring high-quality results. The natural bristle material contributes to optimal absorption and release of the material, and helps create a uniform and professional nail structure.