Designed specifically for Shark FlexStyle HD400 series. Dual rotation directions (clockwise & counter-clockwise) for seamless styling. Effortless auto-curl feature that automatically wraps hair around the barrel. Versatile curl directions for both classic inward and trendy outward curls. Ideal size for creating beautiful loose waves and voluminous, bouncy curls, perfect for a salon-quality look at home. Compatibility: This curling barrel is designed specifically for Shark FlexStyle HD400 series. Dual Rotation and Seamless Styling: The barrel features dual rotation directions (clockwise & counter-clockwise). You can easily switch directions mid-style without removing the attachment, allowing for a continuous and effortless curling session. Effortless Auto-Curl: Simply place a section of hair into the guide, and the attachment automatically draws in and wraps the hair around the barrel for you. This self-curling creates perfect, consistent curls with minimal effort and skill required. Versatile Curl Directions: Achieve both classic inward curls (under-direction) and trendy outward curls (over-direction) by simply switching the rotation setting. This flexibility allows you to create a variety of mixed, face-framing hairstyles. Create Beautiful Loose Waves: The barrel is the ideal size for creating gorgeous, defined loose waves and voluminous, bouncy curls. Achieve a salon-quality, relaxed beachy look or glamorous, long-lasting curls at home. Color: As Shown Material: plastic Package Contents: 1*Hair Curling Barrel Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.