Sanwood Reusable Vacuum Suction Cup Kitchen Toilet Paper Holder (Paper Holder) Material: ABS + Chromium Plated + PVC Holder Dimension: 17cm x 7cm/6.69" x 2.76" (Approx.) Suction Cup Diameter: 5.5cm/2.17" (Approx.) Suction works best on clean 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 Super power vacuum lock suction technology allows this product to install and reuse without glue or tools,it's easy to install and very eco-friendly.