The kent ks31 is a 40mm diameter core ceramic coated radial brush with a heat retaining core ceramic coated heads absorb heat in a uniform manner and aid drying time and styling great for straightening bobbed hair and creating loose curls for medium length hair g b kent sons ltd manufacturers of brushes since the eighteenth century is one of the oldest established companies in great britain kent have been supplying stores such as john lewis selfridges harrods fortnum and mason along