The special curved nylon bristles and the ceramic and titanium oxide surfaces make this professional brush more effective and easier to use. Made with ultra-light, anti-stress materials. Diameters: 25 mm, 33 mm, 43 mm (.98 in, 1.3 in, 1.69 in). Ergonomic, effective and resistant: the Elchim's brushes are developed and manufactured to be the perfect tools to detangle, soften and tame even the most rebellious hair.