The Thairapy365 Tri Curl Clipless Curling Iron uses an interchangeable barrel system that delivers unparalleled styling versatility with 19mm, 25mm, and 32mm tourmaline ceramic barrel options. The clipless curler heats the hair from the strongest point (the root) allowing the least amount of heat to touch the most delicate point (the tips), easily creating natural smooth curls to gorgeous loose waves in seconds. Includes heat resistant glove. Equipped with an ergonomic heat resistant handle and 360 degree swivel cord for easy handling and easy, quick release interchangeable barrels. -The 19mm (3/2 in.) is ideal for: Smoothing and defining naturally curly hair -The 25mm (1 in.) is ideal for: Creating smooth, loose curls -The 32mm (1 1/4 in.) is ideal for: Creating loose, effortless waves Dual voltage 110V / 220V.