The Detailed Descriptions for Rainbow Volume Brushes:Material: Made of quality ABS plastic with rubber coatedand glass.Diameter: 7.4cm/2.9inches; Teeth: 2.5cm/0.98inches. Total Length: 15cm/5.9inch.Air cushion design, gently massage of scalp, increase circulation and hair growth, improve sleep quality and prevent hair loss.Rainbow colors, reduces the friction with hair, anti-knotted, anti-static, make comb easy in dry cold day.Keeps straight hair smooth, glossy and wavy hair roll fluffy, elegant. It has a back magic mirror for your convenience.Works with Any hair types: thick, thin, curly, straight, wigs, dry or wet.Customized patterns,logos and packagings are welcome.Another rainbow volume brushes recommended to you as below for your reference.