DANNYCO MEDIUM CIRCULAR BRUSH Bamboo wood handle Lightweight Ergonomic handle with smooth edges Circular THERMAL ceramic brushes Four barrel diameters: 25 mm, 35 mm, 43 mm, 52 mm Ball tipped firm nylon bristles infused with tourmaline Vented ceramic barrel Also available in SMALL ( BMBOO-SC ), LARGE ( BMBOO-LC ), EXTRA-LARGE ( BMBOO-XLC )