Compatibility: Zephblow large round volumizing brush attachment is compatible with shark flexstyle air styling & drying systems (HD400 Series),for HD430/HD435/HD440,Round Brush Attachment for Volume: Designed to lift hair from the roots, this large round volumizing brush for shark flex style creates exceptional volume and body for all hair types, making it an essential tool for styling longer hair,Engineered for Longer Hair Types: The round brush for shark flexstyle with long, fine bristles is specifically designed to create tension and shape longer hair, making it ideal for those looking to achieve voluminous, styled hair,360-Degree Ventilation for Even Heat Distribution: Unique honeycomb design at the base ensures even airflow distribution, protecting hair from excessive heat damage while providing consistent styling results,Anti-Static & Gentle Bristles: Features anti-static bristles that reduce hair damage and tangling, ensuring a smooth, comfortable, and frizz-free styling experience