K-Steel Vacuum Suction Cup Soap Dishes Holder Stainless Steel Kitchen Toilet Soap Dishes 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. Innovative rotate and lock suction technology allows this product to install without glue or tools,it's easy to install. Self-draining storage for all your shower essentials. Material:SUS304 stainless steel,cup:plastic,Dimensions:12.8 x 10.5 x 3cm(5.04x4.14x1.18inch)