universal hair dryer diffuser it is 14cm high, 15cm wide on the outside. ... from blow dryers by distributing the harsh dryer heat more evenly throughout your hair 1.Distensible socket, fits most dryers. ... Fit dryer socket outer diameter: 4.3cm-5.0cm (fits all over the dryer).3.Removable stretched rubber cover. universal hair dryer diffuser,universal hair dryer nozzles,universal hair dryer concentrators