Phillips Brush Ceramic Round Brush 2 3/4 Inch Ceramic core Nylon bristle, Ribbed rubber grip Recessed pick in handle 2 3/4 diameter This unique brush features a vented, aluminum barrel head. This thoughtful design not only allows hot air to pass directly through the brush for an even and fast dry, but the aluminum head actually stores heat from your blowdryer as well, allowing you to create those coveted curls while your blowdry.