ghd The Blow Dryer - Radial Brush size 4 (55mm barrel)The ghd the blow dryer radial brush size 4 (55mm barrel) is best for long and extra long hair, or creating lots of volume in mid length styles. This ceramic barrelled hair brush retains the heat from your hair dryer to allow for a faster blow dry. The essential collection of professional hair brushes for a soft, high volume blow dry. The ghd ceramic vented radial range of brushes delivers shape, volume and shine to your blow dry for a salon fresh