Denman Hairbrush - ThermoCeramic Curl 30mm (D74). Designed to maximise heat distribution, tension and grip, our Denman Thermo-Ceramic Curl D74 delivers fast, easy styling and curling. Vented for rapid blow-drying and with gentle, flexible bristles, our small ThermoCeramic radial creates curls, body and movement.Maximising the heat needed for setting the style, the 30mm diameter of our curling brush quickly creates full body curls and volume. Gentle and flexible bristles generate maximum grip and are kind to the scalp.