The thermoceramic anti-static coating on the rollers helps to retain the heat from the hairdryer, which creates better, longer-lasting curls. The self-grip metallic thread on each roller helps to smooth and add shine to the hair. It is a fast and simple way to add volume without the need for clips and pins. For best results, please allow the heat to cool in the hair for stronger curls. These large-sized rollers are easy to identify due to their blue barrels. Five rollers per pack. Four other sizes also available. Pack Contains 5 x Rollers.