ghd Ceramic Radial Brush 3 - 45mmWhat It Is The size 3 blow out brush is perfect for blow drying medium to longer hair, creating smooth, voluminous styles. Its 45mm ceramic barrel retains heat to speed up the blow dry process for faster, flawless results. What It Does With a hollow 45mm ceramic barrel, the size 3 blow out brush ensures quicker blow drying while delivering smooth, voluminous results. The professional, hand finished design allows for controlled, salon quality styling