Aprince Suction Cup Hair Dryer Holder - Super Suction - Super Strong Suction Cup Hook Hair Dryer Rack Bathroom Kitchen Stainless Steel (Hair Dryer Rack 2) Made of SUS304 stainless steel. Innovative rotate and lock suction technology allows this product to install without glue or tools. Suction works best on ceramic tile, glass, mirror, granite, stainless steel, acrylic, laminate and any non-porous surface with glossy finish. Suction will NOT work on stone, wood, sanded tile, porcelain, marble, dry wall & any surface that is bumpy, porous or matte finished. Dimensions: 20x10.5cm Suit for two installation methods: 1. Wall Mount suction cups 2. Coating Glue.