An interchangeable straight barrel that creates mermaid waves, defined curls & natural-looking styles. Designed to be used with the Whirl Trio, Whirl Convertible & Twirl Convertible, our collection of interchangeable barrels offer infinite styling options to elevate your creativity. T3 Tourmaline® & ceramic barrels seal the cuticle to produce shiny, frizz-free results Digital T3 Single Pass™ technology measures & adjusts temperature for consistent, healthy results & one-pass styling All barrels sold separately for alternative styling options This barrel cannot be used without the purchase of an accompanying tool. Compatible with Whirl Trio, Whirl Convertible & Twirl Convertible.