Stainless Steel Suction Shower Basket (Shower Basket) Suction works best on ceramic tile, glass, mirror, granite, stainless steel, acrylic, laminate and any non-porous surface with glossy finish Do NOT buy from other vendors if you want the original high quality product! Innovative rotate and lock suction technology allows this product to install without glue or tools Suction will NOT work on stone, wood, sanded tile, porcelain, marble, dry wall & any surface that is bumpy, porous or matte finished Dimensions: 12" x 3.5" x 3.5", Suction Cup Diameter: 2.5"