- Barrel Diameter: 1/2", Bristle Diameter: 7/8". Experience the newest Olivia Garden NanoThermic Ceramic + ion Round Thermal Collection for professional styling. New Turbo Barrel grants extra large vents for greater airflow and reduced drying time. The Latest Ceramic Technology makes a ceramic coated barrel that heats up faster and retains heat longer for faster and better styling, superior and long-lasting hairstyles. Tourmaline Ion Technology hydrates the cuticle, adds more shine to the hair while eliminating frizz and flyaways with anti-static bristles. The Unique Bristle Design makes special wavy heat resistant bristles with soft-tips that are gentle on hair and scalp. Unique Handle Design has a snag-free ring and easy-grip ergonomic handle making it lightweight for effortless styling. Handle contains a retractable sectioning pick.