Natural Boar Bristles Round Hair Brushes: 2.2" Diameter (9 inch long). Professional grade, Styling Essentials: For Smooth Finishing, Blow Drying and Curling. 100% Natural Boar Material: Stimulate scalp and promote blood flow while condition dry hair to repair, add shine and volume. Anti-static, Anti-bacterial, High Heat Resistant. Last for years. Ergonomic Design: Natural wood handle with anti-slip and ergonomic curve to improve grip for your hand palm while styling.