Shark FlexStyle Oval Brush, compatible with HD440. Attachable brush smooths, defrizzes, and adds volume & bounce, while delivering powerful airflow -- thanks to the Dual bristle combination. The ergonomic oval shape ensures easy handling, even heat distribution to minimise damage, and optimal styling control. The flex style attachment is versatile for fine, medium, thick, curly, and wavy hair, accommodating various hair types, textures and styles. The hair styler brush is designed to create salon-quality styling experiences at home!