The Haarföhnhalter looks visually very appealing, has at the top of a white rubber insert to protect the hairdryers. Fortunately we had, as in the product description no diameter of the holder was given and the Foehn with the narrow top are usually already about 10 cm wide. As I said, the inner diameter is 9.7 cm, thus you have to insert the hair dryer at a slight angle, if it is wider. This is fixed with 2 screws and 6 dowels St..