B&S FEEL Stainless Steel Shower Caddy with Rotate & Lock Suction Cups Innovative rotate and lock suction technology that works beyond just tiles and glass and installs 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: 9.75" x 4", Suction Cup Diameter: 2.5"